Question 1

In interpreting effect size, what is the meaning of effect size at 0.4?

Accepted Answer

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

Question 2

In the statement, z = 1.42, p > .05, which of the following interpretations is true?

Accepted Answer

A) There is a significant difference between the sample value and the population. 
B) There is a marginally significant difference between the sample value and the population. 
C) There is not a significant difference between the sample value and the population. 
D) The answer cannot be determined from the information given. 
A) There is a significant difference between the sample value and the population. 
B) There is a marginally significant difference between the sample value and the population. 
C) There is not a significant difference between the sample value and the population. 
D) The answer cannot be determined from the information given.

Question 3

The_______ is used as the denominator in the equation for the z value in a one-sample Z-test.

Accepted Answer

A) standard error of the median 
B) standard error of the population 
C) standard error of the mean 
D) standard error of the sample 
A) standard error of the median 
B) standard error of the population 
C) standard error of the mean 
D) standard error of the sample

Question 4

For the Z-test, the population's standard deviation is ______.

Accepted Answer

A) not known 
B) known 
C) not relevant 
D) not sure 
A) not known 
B) known 
C) not relevant 
D) not sure

Question 5

What are the guidelines in using effect size?

Accepted Answer

The small effect size ranges f

Question 6

The level of risk associated with the null hypothesis is generally set at _______.

Accepted Answer

A) .05 
B) .10 
C) .001 
D) .20 
A) .05 
B) .10 
C) .001 
D) .20

Question 7

The one-sample Z-test is used to compare the _______ to the _______.

Accepted Answer

A) mean of a sample, mean of a population 
B) mean of a population, mean of a sample 
C) mean of a sample, mean of a second sample 
D) mean of a population, mean of a second population 
A) mean of a sample, mean of a population 
B) mean of a population, mean of a sample 
C) mean of a sample, mean of a second sample 
D) mean of a population, mean of a second population

Question 8

After conducting a one-sample Z-test, you arrived at a value of −12.5 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 
A) reject the null hypothesis 
B) accept the null hypothesis 
C) the result is too close to call 
D) none of these

Question 9

Mr.Moo would like to find out if his daisies grow at a faster average rate than the average rate of daisy growth in his neighborhood.State this as a null hypothesis.

Accepted Answer

The average rate of growth for

Question 10

If your sample mean is 12, your population average is 19, and your standard error of the mean is 4, what is your observed z value?

Accepted Answer

A) −1.75 
B) 5 
C) 4 
D) 6 
A) −1.75 
B) 5 
C) 4 
D) 6

Question 11

The denominator in the equation for the z value is equal to ______.

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

Question 12

If the obtained value is higher than the critical value, we ______.

Accepted Answer

A) reject the null hypothesis 
B) accept the null hypothesis 
C) reject the research hypothesis 
D) cannot determine what to do 
A) reject the null hypothesis 
B) accept the null hypothesis 
C) reject the research hypothesis 
D) cannot determine what to do

Question 13

For the t-test, the population's standard deviation is ______.

Accepted Answer

A) not known 
B) known 
C) not relevant 
D) not sure 
A) not known 
B) known 
C) not relevant 
D) not sure

Question 14

Write the formula of the null hypothesis for the following research problem: The Geography Department is interested in finding out if the average GPA of this year's graduating seniors is comparable to the average GPA of graduating seniors over the last 40 years.

Accepted Answer

The null hypothesis (H0) for the researc

Question 15

How many groups are compared in a one-sample Z-test?

Accepted Answer

A) 2 or more 
B) 1 
C) 3 
D) 4 
A) 2 or more 
B) 1 
C) 3 
D) 4

Question 16

In t-test, if the resultant t value is 2.72 and p<.05, what is the interpretation?

Accepted Answer

A) There is a statistical significance in the test. 
B) There is no statistical significance in the test. 
C) unknown 
D) not sure 
A) There is a statistical significance in the test. 
B) There is no statistical significance in the test. 
C) unknown 
D) not sure

Question 17

If your sample mean is 20, your population average is 10, and your standard error of the mean is 2, what is your observed z value?

Accepted Answer

A) −5 
B) 5 
C) 0 
D) 50 
A) −5 
B) 5 
C) 0 
D) 50

Question 18

An alternative hypothesis in a one-sample Z-test could be represented as follows:

Accepted Answer

A) $$H _ { 1 } : \bar { X } > \mu$$ B) $$H _ { 0 } : \bar { X } > \mu$$ C) $$H _ { 0 } : \bar { X } = \mu$$ D) $$H _ { 0 } : \bar { X } < \mu$$ A) $$H _ { 1 } : \bar { X } > \mu$$ B) $$H _ { 0 } : \bar { X } > \mu$$ C) $$H _ { 0 } : \bar { X } = \mu$$ D) $$H _ { 0 } : \bar { X } < \mu$$

Question 19

After the z value is calculated, the _______ is gathered from a table of z scores.

Accepted Answer

A) obtained value 
B) test value 
C) calculated value 
D) critical value 
A) obtained value 
B) test value 
C) calculated value 
D) critical value

Question 20

The null hypothesis in a one-sample Z-test would be represented as follows:

Accepted Answer

A) $$H _ { 0 } : \bar { X } = \mu$$ B) $$H _ { 1 } : \bar { X } = \mu$$ C) $$H _ { 0 } : \bar { X } > \mu$$ D) $$H _ { 0 } : \bar { X } < \mu$$ A) $$H _ { 0 } : \bar { X } = \mu$$ B) $$H _ { 1 } : \bar { X } = \mu$$ C) $$H _ { 0 } : \bar { X } > \mu$$ D) $$H _ { 0 } : \bar { X } < \mu$$

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

In interpreting effect size, what is the meaning of effect size at 0.4?

In the statement, z = 1.42, p > .05, which of the following interpretations is true?

The_______ is used as the denominator in the equation for the z value in a one-sample Z-test.

For the Z-test, the population's standard deviation is ______.

What are the guidelines in using effect size?

The level of risk associated with the null hypothesis is generally set at _______.

The one-sample Z-test is used to compare the _______ to the _______.

After conducting a one-sample Z-test, you arrived at a value of −12.5 for the z value.What is your conclusion?

Mr.Moo would like to find out if his daisies grow at a faster average rate than the average rate of daisy growth in his neighborhood.State this as a null hypothesis.

If your sample mean is 12, your population average is 19, and your standard error of the mean is 4, what is your observed z value?

The denominator in the equation for the z value is equal to ______.

If the obtained value is higher than the critical value, we ______.

For the t-test, the population's standard deviation is ______.

Write the formula of the null hypothesis for the following research problem: The Geography Department is interested in finding out if the average GPA of this year's graduating seniors is comparable to the average GPA of graduating seniors over the last 40 years.

How many groups are compared in a one-sample Z-test?

In t-test, if the resultant t value is 2.72 and p<.05, what is the interpretation?

If your sample mean is 20, your population average is 10, and your standard error of the mean is 2, what is your observed z value?

An alternative hypothesis in a one-sample Z-test could be represented as follows:

After the z value is calculated, the _______ is gathered from a table of z scores.

The null hypothesis in a one-sample Z-test would be represented as follows:

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