Question 1

In the formula for calculating a z score, what does μ stand for?

Accepted Answer

A)  the obtained value
B)  the critical value
C)  the population average
D)  the sample average

Question 2

In interpreting effect size, what is the meaning of effect size at 0.3?

Accepted Answer

A)  small effect size
B)  medium effect size
C)  large effect size
D)  weak effect size

Question 3

After conducting a one-sample Z-test, you arrived at a value of 0.2 for the z value.What is your conclusion?

Accepted Answer

A)  reject the null hypothesis
B)  accept the null hypothesis
C)  the result is too close to call
D)  None of these

Question 4

In the formula for calculating a z score, what does SEM stand for?

Accepted Answer

A)  standard error of the medium
B)  standard ease of the mean
C)  standard error of the mean
D)  standard ease of the medium

Question 5

If you have a population standard deviation of 7 and a sample size of 100, what is your standard error of the mean?

Accepted Answer

A)  −3
B)  7
C)  10
D)  0.7

Question 6

In z = 2.56, p < .05, what is the probability?

Accepted Answer

A)  p 
B)  2.56
C)  z = 2.56
D)  There is no probability here.

Question 7

The results of both one-sample Z- and t-test are basically the same.

Accepted Answer

A) True 
 B)False

Question 8

If our sample selection was perfect, what would be the difference between the sample and population averages?

Accepted Answer

A)  zero
B)  one
C)  one or greater
D)  less than one

Question 9

In z = 2.56, p < .05, what is the obtained value?

Accepted Answer

A)  .05
B)  
C)  2.56
D)  2.56 ÷ .05

Question 10

In the formula for calculating standard error of the mean, what does n stand for?

Accepted Answer

A)  the population average
B)  the sample size
C)  the population size
D)  the sample average

Question 11

If the obtained value is not higher than the critical value, we ______.

Accepted Answer

A)  reject the null hypothesis
B)  accept the null hypothesis
C)  accept all hypotheses
D)  reject all hypotheses

Question 12

If your sample mean is 25, your population average is 20, and your standard error of the mean is 8, what is your observed z value?

Accepted Answer

A)  1.5
B)  3
C)  −5
D)  0.63

Question 13

In the effect size formula, what does d stand for?

Accepted Answer

A)  the sample mean
B)  effect size
C)  the population mean
D)  the population standard deviation

Question 14

Sample size is taken into account when computing effect size.

Accepted Answer

A) True 
 B)False

Question 15

In the formula for calculating a z score, what does σ stand for?

Accepted Answer

A)  standard error of the mean
B)  the z value
C)  the sample standard deviation
D)  the population standard deviation

Question 16

A one-sample Z-test can be used to compare the mean of two samples.

Accepted Answer

A) True 
 B)False

Question 17

If you're comparing the test scores between two classrooms, you should use a one-sample Z-test.

Accepted Answer

A) True 
 B)False

Question 18

If you have a population standard deviation of 18 and a sample size of 36, what is your standard error of the mean?

Accepted Answer

A)  −3
B)  7
C)  10
D)  3

Question 19

The numerator of the equation for the z value is ______.

Accepted Answer

A)  the population average subtracted from the mean of the sample
B)  the mean of the sample subtracted from the population average
C)  the mean of the sample subtracted from the standard error of the mean
D)  the standard error of the mean added to the mean of the sample

Question 20

If you have a population standard deviation of 2 and a sample size of 9, what is your standard error of the mean?

Accepted Answer

A)  0.76
B)  −0.67
C)  0.67
D)  −0.76

Exam 10: Only the Lonely: The One Sample Z-Test

If you have a population standard deviation of 2 and a sample size of 9, what is your standard error of the mean?

Correct AnswerverifiedShow Answer

In the formula for calculating a z score, what does σ stand for?

Correct AnswerverifiedShow Answer

In z = 2.56, p < .05, what is the probability?

Correct AnswerverifiedShow Answer

In interpreting effect size, what is the meaning of effect size at 0.3?

Correct AnswerverifiedShow Answer

In the formula for calculating a z score, what does μ stand for?

Correct AnswerverifiedShow Answer

If you're comparing the test scores between two classrooms, you should use a one-sample Z-test.

Correct AnswerverifiedShow Answer

If your sample mean is 25, your population average is 20, and your standard error of the mean is 8, what is your observed z value?

Correct AnswerverifiedShow Answer

In z = 2.56, p < .05, what is the obtained value?

Correct AnswerverifiedShow Answer

If you have a population standard deviation of 7 and a sample size of 100, what is your standard error of the mean?

Correct AnswerverifiedShow Answer

The results of both one-sample Z- and t-test are basically the same.

Correct AnswerverifiedShow Answer

In the formula for calculating standard error of the mean, what does n stand for?

Correct AnswerverifiedShow Answer

After conducting a one-sample Z-test, you arrived at a value of 0.2 for the z value.What is your conclusion?

Correct AnswerverifiedShow Answer

If you have a population standard deviation of 18 and a sample size of 36, what is your standard error of the mean?

Correct AnswerverifiedShow Answer

The numerator of the equation for the z value is ______.

Correct AnswerverifiedShow Answer

In the effect size formula, what does d stand for?

Correct AnswerverifiedShow Answer

If our sample selection was perfect, what would be the difference between the sample and population averages?

Correct AnswerverifiedShow Answer

If the obtained value is not higher than the critical value, we ______.

Correct AnswerverifiedShow Answer

In the formula for calculating a z score, what does SEM stand for?

Correct AnswerverifiedShow Answer

Sample size is taken into account when computing effect size.

Correct AnswerverifiedShow Answer

A one-sample Z-test can be used to compare the mean of two samples.

Correct AnswerverifiedShow Answer

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