There are ten kids in a class. When any two meet, they shake their hands.Before the class starts, how many handshakes are there?

Answers

Answer 1

Answer: 45

Step-by-step explanation:

Ok, Kid 1 can meet other 9 kids, so we have 9 handshaks.

Kid 2 can also meet other 9 kids, but he already meet kid 1, so we are not counting that handshake, this means that now we have 8 handshakes.

Kid 3 can also meet 9 kids, but we already counted the handshake with kid 1 and kid 2, so here we have other 7 andshakes.

And so on, so we have a total of:

9 + 8 + 7 + 6 + 5 + 4 +3 + 2 + 1 = 45 handshakes in total.

Answer 2

Answer:

45 handshakes

Step-by-step explanation:


Related Questions

You randomly draw a lane number for a 100-meter race. Then your friend randomly draws a

Lane number for the same race. Are these events independent or dependent?*

Answers

Answer:

Dependent

Step-by-step explanation:

Because you and your friend are in the same race, the lane number your friend will get is affected by your random draw.

Lane number for the same race is a dependent Event.

What is Independent and Dependent variable?

An easy way to think of independent and dependent variables is, when you're performing an experiment, the independent variable is what you change, and the dependent variable is what changes because of that. The independent variable can alternatively be viewed as the cause, and the dependent variable as the result.

We have,

A lane number for a 100-meter race.

Here, Lane number for same race is dependent Quantity.

As, You and a friend are competing in the same race.

Then, your random draw will determine which lane number your friend will receive.

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A certain vehicle emission inspection station advertises that the wait time for customers is less than 8 minutes. A local resident wants to test this claim and collects a random sample of 64 wait times for customers at the testing station. She finds that the sample mean is 7.43 ​minutes, with a standard deviation of 3.6 minutes. Does the sample evidence support the inspection​ station's claim? Use the alphaequals0.005 level of significance to test the advertised claim that the wait time is less than 8 minutes.

Answers

Final answer:

The sample evidence does not support the inspection​ station's claim that the wait time is less than 8 minutes.

Explanation:

To test the claim that the wait time at the vehicle emission inspection station is less than 8 minutes, we can conduct a hypothesis test using the sample data provided. The null hypothesis (H0) is that the mean wait time is greater than or equal to 8 minutes, and the alternative hypothesis (Ha) is that the mean wait time is less than 8 minutes.

We need to calculate the test statistic, which is the t-value. The formula to calculate the t-value is:

t = (sample mean - population mean) / (sample standard deviation / sqrt(sample size))

Using the given data, we can plug in the values:

t = (7.43 - 8) / (3.6 / sqrt(64))

Calculating this gives us a t-value of -1.248.

Next, we need to determine the critical value at a significance level of 0.005. Since the alternative hypothesis is that the mean wait time is less than 8 minutes, we will use a one-tailed test and find the critical value from the t-distribution table. At a significance level of 0.005 and 63 degrees of freedom (64 - 1), the critical value is -2.650.

Finally, we compare the test statistic to the critical value. If the test statistic is less than the critical value, we reject the null hypothesis. In this case, -1.248 is greater than -2.650, so we fail to reject the null hypothesis. This means that the sample evidence does not support the inspection station's claim that the wait time is less than 8 minutes at a significance level of 0.005.

(9/3)+4(6-7)
Simplify the expression

Answers

Answer:

7

Step-by-step explanation:

Answer:

-1

Step-by-step explanation:

(9/3)+24-28

(3)+(-4)

-1

A restaurant has 10 sodas that come in 12 different cup sizes. How many different drinks can you order?

Answers

Answer:

There are 120 different drinks that you can order.

Step-by-step explanation:

You have 10 options of soda for which you can choose.

For each options, there are 12 different cup sizes.

12*10 = 120

So there are 120 different drinks that you can order.

A pole that is 12 feet tall casts a shadow that is 9 feet long. At the same time of day, how long is the shadow cast by a tree that is 45 feet tall?

Answers

Hmmm that’s a good question

Final answer:

To find the length of the shadow cast by the tree, calculate the scale factor between the pole and its shadow, then multiply this factor by the height of the tree to get the length of the tree's shadow.

Explanation:

To find the length of the shadow cast by the tree:

Calculate the scale factor between the pole and its shadow: 12 feet pole casts a 9 feet shadow, so the scale factor is 12/9 = 4/3.

Multiply this scale factor by the height of the tree: 45 feet x 4/3 = 60 feet shadow cast by the 45 feet tall tree.

rewrite the equation by completing the square x^2+x-72=0

Answers

Answer:

(x + 1/2) ² = 289/4

Step-by-step explanation: I answered this correctly

The solutions to t[tex]x^2 + x = 72[/tex]he equation [tex]x^2 + x - 72[/tex] = 0 are x = 8 and x = -9.

To rewrite the quadratic equation[tex]x^2 + x - 72[/tex] = 0 by completing the square, we follow these steps:

Step 1: Move the constant term to the other side of the equation:

[tex]x^2 + x = 72[/tex]

Step 2: Take half of the coefficient of the x-term (which is 1) and square it. Add this value to both sides of the equation:

[tex]x^2 + x + (1/2)^2 = 72 + (1/2)^2\\x^2 + x + 1/4 = 72 + 1/4[/tex]

Step 3: Rewrite the left side as a perfect square:

[tex](x + 1/2)^2 = 289/4[/tex]

Step 4: Take the square root of both sides:

x + 1/2 = ± √(289/4)

Step 5: Solve for x:

x + 1/2 = ± 17/2

x = -1/2 ± 17/2

x = (-1 + 17)/2 or x = (-1 - 17)/2

x = 16/2 or x = -18/2

x = 8 or x = -9

The solutions to the equation [tex]x^2 + x - 72[/tex] = 0 are x = 8 and x = -9.

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What is the area of the parallelograms?what is the square unit ?

Answers

Answer:

35 units^2.

Step-by-step explanation:

Area = base * altitude

= 7 * 5.

Answer:

35 sq. un.

Step-by-step explanation:

The Intuition for why the area of a parallelogram is A=bh (area = base x height)

The formula for the area of a parallelogram is base times height, just like the formula for the area of a rectangle.

Have a great day!

What is the exact decimal equivalent of 7/12​

Answers

Well if you divide 7 divided by 12 you get 0.583 which you can round however you wish but I am not sure if that’s what you mean

The scores of individual students on the American College Testing (ACT), college readiness assessment, have a Normal distribution with a mean of 18.6 and a standard deviation of 6.0. At Northside High, 36 seniors take the test. Assume the scores at this school have the same distribution as national scores. What is the standard deviation of the sampling distribution of the sample mean score for a random sample of 36 students

Answers

Answer:

The standard deviation of the sampling distribution of the sample mean score for a random sample of 36 students is 1.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this problem, we have that:

[tex]\sigma = 6, n = 36[/tex]

Then, by the Central Limit Theorem:

[tex]s = \frac{\sigma}{\sqrt{n}}[/tex]

[tex]s = \frac{6}{\sqrt{36}}[/tex]

[tex]s = 1[/tex]

The standard deviation of the sampling distribution of the sample mean score for a random sample of 36 students is 1.

Run a multiple regression where the dependent variable is ratings and the independent variables are star and fact. Use data from CBC only. CBC Management has several questions: Which has more impact on a movie’s rating: Being fact-based or having one star? How much does each of these factors change the ratings? How well does this regression analysis explain the ratings? Justify your answers referring to the relevant figures. Are either, both, or neither of the independent variables significantly related to the ratings at 95% confidence? Justify your answers referring to the relevant figures.

Answers

Answer:

See explaination

Step-by-step explanation:

See attachment for diagram

The r value is 0.373 (low). This implies a weak correlation between the dependent and independent variables for this sample.

The overall p- value for the regression model is 0.0017. This implies that at least one of the two independent variables (x1 or x2) in the model is significant predictor of the dependent variable y.

p- values for the both "Fact" and "Star" are < 0.05. This means both the independent variables are significant predictors of the "Rating" at 95% confidence level. The variable "Fact" is significant at 99% level of confidence also. This means the rating viewers award to a movie depends upon both the storyline (fact or Fiction) and the presence or absence of stars.

Expected rating for a fact based movie with no stars = 1.7991(1) + 1.2586(0) + 12.5685 = 14.37

Expected rating for a fiction based movie with a star = 1.7991(0) + 1.2586(1) + 12.5685 = 13.83

So, one may expect a fact based movie without any stars to get better ratings than a fiction based movie with one star.

Simplify this complex fraction

Answers

Answer:

2/ 21

Step-by-step explanation:

2/3 ÷ 7

Copy dot flip

2/3 * 1/7

2/ 21

grammium-the metal billings used to make the statuettes-is a mixture of aluminum and zinc. each atom of aluminum has 13 protons. that's 3 more than 1/3 the number, z, of protons in an atom of zinc. write and solve an equation to find z

Answers

I believe the equation would look like 1/3z+3=13.

When dealing with these types of problems you need to understand and recognize certain words. For example, more than always means addition, whatever number will be added to another term. With fractions, when the question says “1/5 the number” or in this case “1/3 the number” it will mean multiplication. So we could always put together 1/3z+3. Lastly, the questions states that 13 protons IS 3 more than 1/3 the number, in meaning our expression will equal to 13 which creates the equation 1/3z+3=13.

This can also be proven correct because this questions actually follows how many protons each atom have, aluminum has 13 while zinc has 30.

A study was conducted to investigate the effectiveness of hypnotism in reducing pain. An SRS of 8 subjects was randomly selected, and the pain level was recorded for each one, with a lower score indicating less pain. After the subjects were hypnotized, their pain level was recorded again. The researchers calculated the difference in the pain level for each subject, calculated as After – Before. Assume the differences follow an approximately normal distribution, with the following sample statistics: Is pain, on average, lower after hypnotism? Test at a 1% significance level. a. The assumptions for this test are not met because the sample size is too small. b. Yes, the p-value is less than 0.01, so there is sufficient evidence at the 0.01 level to conclude that pain levels are lower after hypnotism. c. Yes, the p-value is greater than 0.01, so there is sufficient evidence at the 0.01 level to conclude that pain levels are lower after hypnotism. d. No, the p-value is less than 0.01, so there is insufficient evidence at the 0.01 level to conclude that pain levels are lower after hypnotism. e. No, the p-value is greater than 0.01, so there is insufficient evidence at the 0.01 level to conclude that pain levels are lower after hypnotism. 3 points Save Answer

Answers

Answer:

e. No, the p-value is greater than 0.01, so there is insufficient evidence at the 0.01 level to conclude that pain levels are lower after hypnotism.

Step-by-step explanation:

Hello!

The study's objective is to test if hypnotism reduces pain.

A sample of n=8 subjects was taken and the pain level was recorded in each subject before and after being hypnotized.

The variable of interest was determined by calculating the difference of pain level after - before hypnosis. This is a paired sample test and the variable can be determined as:

Xd: Difference between pain level felt after hypnosis and pain level felt before hypnosis of a subject.

The sample average and standard deviation obtained were:

Xd= -3

Sd= 3

And the variable is presumed to be approximately normal.

An approximately normal distribution is enough to conduct a paired sample t-test.

If the claim is that hypnosis reduces pain, then the average pain level after hypnosis should be less than the average pain level before hypnosis, then the average difference is expected to be negative, symbolically: μd < 0

The test will be one-tailed and so will be the p-value.

Remember: The p-value is defined as the probability corresponding to the calculated statistic if possible under the null hypothesis (i.e. the probability of obtaining a value as extreme as the value of the statistic under the null hypothesis).

So first step is to calculate the value of the statistic under the null hypothesis and then you can calculate the p-value.

H₀: μd ≥ 0

H₁: μd < 0

[tex]t_{H_0}= \frac{X_d-Mu_{d}}{\frac{S_d}{n} }= \frac{-0-0}{\frac{3}{\sqrt{8} } } = -2.828= -2.83[/tex]

The DF of the t-test are n-1= 7

Then you can calculate the p-value as:

P(t₇≤-2.83)= 0.0127

The level of the test is α: 0.01

The decision rule is:

If p-value ≤ α, reject the null hypothesis.

If p-value > α, do not reject the null hypothesis.

The p-value > α the decision is to not reject the null hypothesis.

Correct option: e. No, the p-value is greater than 0.01, so there is insufficient evidence at the 0.01 level to conclude that pain levels are lower after hypnotism.

I hope this helps!

Todd has $124 in his checking account. He wrote two checks for $13.96 and $21.67 and transferred
$14 into his checking from his savings.
What is his new balance?

Answers

Answer:

$[tex]74.37[/tex]

Step-by-step explanation:

To figure out how much is left in his checking account, simply subtract the amount he took out.

[tex]124 -13.96 = 110.04[/tex]

[tex]110.04 - 21.67 =88.37[/tex]

[tex]88.37 - 14= 74.37[/tex]

$[tex]74.37[/tex] is left in his checking account.

Answer:

$102.37

Step-by-step explanation:

Todd has $124 to begin with

He writes two checks (subtract) $13.96 & $21.67

Then he removes $14.00 from his savings & places it into his Checking. (Adding) it to his checking account balance

$124-13.96-21.67+14 = $102.37

What is the value of x

Answers

Answer: The answer is b

Step-by-step explanation:

The answer is b due to the exterior angle theorem which is 1 exterior angles = 2 interior angles on the opposites sides

so the eqaution is

105= 67+x

and x + 38 which is b

Answer:

C. 33

Step-by-step explanation:

use a protractor in the future

Scott reads 11 pages of a book each day.
How many pages will he read in 7 days?

Answers

Answer:

Scott will read 77 pages in 7 days.

Step-by-step explanation:

7x11=77

kitchen tiles cost £2.75 each
work out the total cost for 62 tiles

Answers

Answer:

170.5

Step-by-step explanation:

2.75x62=170.5 hope this helps

2.75*62=170.5£
For one tile =2.75
For 62=170.5
Phleeez mark me as the brainliest

Lee and Maya are collecting leaves for an art project. Lee collect 24/100 of the tiral number of leaves needed. Maya collects 4/10 of the total number of leaves needed. What fraction of tge total number of leaves did they collect altogether?

Answers

Answer:

The fraction of the total number of leaves did they collect altogether is [tex]\frac{16}{25}[/tex]

Step-by-step explanation:

This question can be solved by a sum of fractions.

Lee collect 24/100 of the tiral number of leaves needed.

Maya collects 4/10 of the total number of leaves needed.

What fraction of the total number of leaves did they collect altogether?

This is the sum of 24/100 and 4/10.

The lesser common multiple between 100 and 10 is 100. So

[tex]\frac{24}{100} + \frac{4}{10} = \frac{24 + 10*4}{1001} = \frac{64}{100}[/tex]

We can simplify by four

The fraction of the total number of leaves did they collect altogether is [tex]\frac{16}{25}[/tex]

Final answer:

Lee and Maya have collected 64/100 or 64% of the total number of leaves needed for their project when we add Lee's 24/100 and Maya's 40/100 together.

Explanation:

Lee has collected 24/100 of the leaves, and Maya has collected 4/10 of the leaves for their art project. To find out what fraction they have collected altogether, we need to add the two fractions. However, before we can do that, we need to make sure the fractions have the same denominator.

Since 4/10 can be simplified to 40/100, we now have a common denominator of 100. Adding the two fractions together:

Lee's leaves: 24/100

Maya's leaves: 40/100

Total leaves collected: 24/100 + 40/100 = 64/100

Therefore, Lee and Maya have collected 64/100 of the total number of leaves needed for their project.

The edges of three squares are joined together to form a right triangle with legs of lengths r and sand a hypotenuse of length t. What must be true?

1) The perimeter of Square T is equal to the sum of the perimeters of Square R and Square S.

2) The area of ​​Square T is four times the area of ​​Square R.

3) The perimeter of Square T is four times the perimeter of Square R.

4) The area of Square T is equal to the sum of the areas of Square R and Square S.

Answers

The area of Square T is equal to the sum of the areas of Square R and Square S.

Is the area of the square and circle the same?

The area of a square is the same as the area of a circle. The perimeters of the circle and square are in the ratio. The area of a square is the same as the area of a circle. The perimeters of the circle and square are in the ratio.

How do you find the area?

To find the area of a rectangle or a square you need to multiply the length and the width of a rectangle or a square. Area, A, is x times y.

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If y varies directly as x and y = 15 when x = 5,what is the value of y when x = 6? a. 5 b. 36 c. 9 d. 18


never mind its D

Answers

The answer to this question is D

what is the sum in simplest form?
4 1/2 + 1 3/5

Answers

Final answer:

To find the sum in simplest form of 4 1/2 and 1 3/5, you convert each to an improper fraction, adding the fractions and convert back to a mixed number. The sum is 6 1/10.

Explanation:

The sum in simplest form of the two numbers 4 1/2 and 1 3/5 can be calculated as follows:

Change each mixed number into an improper fraction. 4 1/2 becomes 9/2 and 1 3/5 becomes 8/5.Then add the two fractions: 9/2 + 8/5 equals 45/10 + 16/10 (after finding a common denominator), which equals 61/10.Finally, convert back to a mixed number to get 6 1/10.

So, the sum in the simplest form of 4 1/2 and 1 3/5 is 6 1/10.

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Please help and get these points

Answers

Answer:

y = 15x

Step-by-step explanation:

The biggest giveaway here is the other answers have + a whole number at the end of the equation. We would see this + as a y-intercept on the graph.

Since our line had no y-intercept and starts from zero, y =15x can be used to represent the graph shown

Another way to know this is to look at the points marked on the line. There is a point at (2, 30). By plugging these co-ordinated into y = 15x we get 30 = 30, which makes sense

Answer:

y=15x

Step-by-step explanation:

because the y-intercept is 0, y=15x is the only choice that has y intercept 0

Suppose a recent nationwide survey showed that 35% of American college students have traveled outside of the USA. But a well known university believes its students have traveled abroad more than the national rate of 35%. A random sample of 100 students from this university had 42 students who have traveled outside the USA. A hypothesis test is then conducted to determine if we can believe that, statistically, more of this university's students have traveled abroad. Using these numbers, what is the value of the test statistic for this hypothesis test

Answers

Answer:

Step-by-step explanation:

We would set up the hypothesis test.

For the null hypothesis,

p = 0.35

For the alternative hypothesis,

p > 0.35

This is a right tailed test considering the > in the alternative hypothesis.

Considering the population proportion, probability of success, p = 0.35

q = probability of failure = 1 - p

q = 1 - 0.35 = 0.65

Considering the sample,

Sample proportion, P = x/n

Where

x = number of success = 42

n = number of samples = 100

P = 42/120 = 0.42

We would determine the test statistic which is the z score

z = (P - p)/√pq/n

z = (0.42 - 0.35)/√(0.35 × 0.65)/100 z = 1.48

The test statistic for the hypothesis test, given a sample proportion of 0.42, hypothesized population proportion of 0.35, and sample size of 100 students, is calculated to be 1.47.

To calculate the test statistic for the hypothesis test, we use the formula for testing a proportion:

Calculate the sample proportion (\(\hat{p}\)): \(\hat{p} = \frac{x}{n}\), where x is the number of students who have traveled abroad in the sample and n is the sample size.Calculate the standard error (SE) of the sample proportion using the formula: SE = \(\sqrt{\frac{p(1-p)}{n}}\), where p is the hypothesized population proportion.Compute the test statistic (z) by subtracting the hypothesized proportion from the sample proportion and dividing the result by the standard error: z = \(\frac{\hat{p} - p}{SE}\).

Using the given numbers, we have:

The sample proportion, \(\hat{p}\), is 42/100 = 0.42.The hypothesized population proportion, p, is 0.35.The sample size, n, is 100.

Now we calculate the standard error:

SE = \(\sqrt{\frac{0.35(1-0.35)}{100}}\) = \(\sqrt{\frac{0.35(0.65)}{100}}\) = \(\sqrt{\frac{0.2275}{100}}\) = 0.0477.

Then we calculate the z-score:

z = \(\frac{0.42 - 0.35}{0.0477}\) = \(\frac{0.07}{0.0477}\) = 1.47.

The value of the test statistic for this hypothesis test is 1.47.

How is the graph of y = (x minus 1) squared minus 3 transformed to produce the graph of y = one-half (x + 4) squared?
The graph is translated left 5 units, compressed vertically by a factor of One-half, and translated up 3 units.
The graph is stretched vertically by a factor of One-half, translated left 5 units, and translated up 3 units.
The graph is translated left 5 units, compressed horizontally by a factor of One-half, and translated down 3 units.
The graph is stretched horizontally by a factor of One-half, translated left 5 units, and translated down 3 units.

Answers

Answer:

A) The graph is translated left 5 units, compressed vertically by a factor of One-half, and translated up 3 units.

Step-by-step explanation:

Edg 2020

It follows from the task content that the transformation required to produce the graph is; The graph is translated left 5 units, compressed vertically by a factor of One-half, and translated up 3 units.

What set of transformations are required to produce the graph?

It follows from the task content that initial equation is; y = (x-1)² - 3 while the transformation produced; y = (1/2)(x+4)².

It therefore follows that upon translation leftwards by 5 units, the (x-1) term becomes (x+4).

And finally, upon compression vertically by a factor of One-half, and translation upwards 3 units. The transformed form of the graph is obtained.

On this note, the required transformations are as indicated above.

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The chickens at Colonel Thompson’s Ranch have a mean weight of 1850 g, with a standard deviation of 150 g. The weights of the chickens are closely approximated by a normal curve. Find the percent of all chickens having weights in the following ranges. 33. More than 1700 g 34. Less than 1950 g 35. Between 1750 and 1900 g 36. Between 1600 and 2000 g 37. More than 2100 g or less than 1550 g 38. Find the smallest and largest weights for the middle 95% of the chickens.

Answers

Answer:

Kindly go through the explanation for all the answers required

Step-by-step explanation:

Values gotten from the question are: mean= 1850

standard deviation= 150

Z= \frac{x- \mu }{\sigma }

33) X= 1700

P(X>1700)=P( \frac{x- \mu }{\sigma }>\frac{1700-1850}{150})=P(Z>-1)

P(X>1700)=P(Z>-1)=1- P(Z\leq -1)=0.8413

34) X= 1950

P(X<1950)=P( \frac{x- \mu }{\sigma }<\frac{1950-1850}{150})=P(Z<0.6667)=0.7475

35) X1= 1750 and X2= 1900

P(1750\leq X\leq 1900)=P( \frac{1750-1850}{150}\leq \frac{x- \mu }{\sigma }\leq \frac{1900-1850}{150})=P(-0.6667\leq Z\leq 0.333)

P(1750\leq X\leq 1900)=P(-0.6667\leq Z\leq 0.333)=0.3781

36) X1= 1600 and X2= 2000

P(1600\leq X\leq 2000)=P( \frac{1600-1850}{150}\leq \frac{x- \mu }{\sigma }\leq \frac{2000-1850}{150})=P(-1.6667\leq Z\leq 1)

P(1600\leq X\leq 2000)=P(-1.6667\leq Z\leq 1)=0.7936

37) X1= 1550 and X2= 2100

P(1550> X> 2100)=P( \frac{1550-1850}{150}> \frac{x- \mu }{\sigma }> \frac{2100-1850}{150})

P(-2>Z>1.6667)=P(Z\leq -2)+(1-P(Z<1.6667))=0.02275+(1-0.9522)=0.0705

38) 95% Confidence interval:Critical value: Z(0.05/2)= 1.96

CI: \mu \pm Z*\sigma =>1850\pm 1.96*150

CI: 1850\pm 294=>(1850-294,1850+294)=>(1556,2144)

The smallest weight= 1556

The largest weight= 2144

A local movie theater is increasing ticket pricesby 10%. If a student ticket originally cost $8.50,how much will the theater be adding to the priceof the ticket?

A. $0.10
B. $0.85
C. $1.50
D. $9.35

Answers

Well If multiply .10 by 8.50 you get .85 therefore answer is B

Answer:

B

Step-by-step explanation:

Because since they are increasing $8.50 by 10% you got to divide by 10 to get the answer. Because 10% is equal as multiplying .10 or dividing by 10. So when you divide by 10 you get 0.85. So B is the answer to the question.

Which expression has the same value as the one below?
10 +(-3)​

Answers

10-3 is the same as 10 +(-3)

Which of the following is NOT a perfect square? Question 3 options: 36 25 49 81 35 144 100

Answers

Answer:

35

Step-by-step explanation:

Answer:

35

Step-by-step explanation:

Which of the following statements about ANOVA completely randomized design is correct? a. The ANOVA test assumes that the sampled populations are normally distributed. b. The ANOVA test assumes that the sampled populations have a common variances . c. The ANOVA test assumes that the samples are randomly and independently selected from their respective populations. d. All of these. e. None of these.

Answers

Answer:

d. All of these.

Step-by-step explanation:

Analysis of variance (ANOVA) is used in statistics to determine the difference between the mean of two groups. A completely randomized design implies that samples are randomly assigned to either a treatment group or a placebo group during the experiment.  For example, if 40 people are selected to test the effect of an analgesic, four groups could be designed- Groups A, B, C, and D. Groups A, B, and C, can be given different amounts of the drug and Group D, given a placebo. This is an example of a randomized design because the participants were randomly assigned to the groups.

For an ANOVA test to exhibit complete randomized design, we assume that the sample populations are normally distributed, and also have the same variances. We also assume in this design, that samples are randomly and independently selected from their respective populations.

what is the median for 460,470,480,480,480,490,490,490,490,490,500,500,510

Answers

Answer:

490

Step-by-step explanation:

The Median is the middle number in the set. In this case, it is 490.

~

Answer:

490

Step-by-step explanation:

the median is simply the middle number, and if there are two, you would add them together then divide whatever the total of those two numbers are by two, like this (4+5)/2

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