Question 1

What does the symbol t represent in the following: t₍₄₂₎ = 5.15, p < .01?

Accepted Answer

A) test statistic 
B) t value 
C) degrees of freedom 
D) probability 
A) test statistic 
B) t value 
C) degrees of freedom 
D) probability

Question 2

In order to compute the test statistic, or t value, you must first approximate the sample size by calculating the _______.

Accepted Answer

A) pooled variance 
B) standard deviation 
C) degrees of freedom 
D) mean score 
A) pooled variance 
B) standard deviation 
C) degrees of freedom 
D) mean score

Question 3

The null hypothesis in an independent-samples t-test would be represented as follows:

Accepted Answer

A)  $$H _ { 0 } : \mu _ { 1 } = \mu _ { 2 }$$ 
B)  $$H _ { 1 } : \bar { X } _ { 1 } \neq \bar { X } _ { 1 }$$ 
C)  $$H _ { 0 } : \bar { X } _ { 1 } \neq \bar { X } _ { 1 }$$ 
D)  $$H _ { 1 } : \mu _ { 1 } = \mu _ { 1 }$$ 
A)  $$H _ { 0 } : \mu _ { 1 } = \mu _ { 2 }$$ 
B)  $$H _ { 1 } : \bar { X } _ { 1 } \neq \bar { X } _ { 1 }$$ 
C)  $$H _ { 0 } : \bar { X } _ { 1 } \neq \bar { X } _ { 1 }$$ 
D)  $$H _ { 1 } : \mu _ { 1 } = \mu _ { 1 }$$

Question 4

The t statistic value is also called the _______.

Accepted Answer

A) critical value 
B) degrees of freedom 
C) obtained value 
D) test computation 
A) critical value 
B) degrees of freedom 
C) obtained value 
D) test computation

Question 5

What does the number 0.01 represent in the following: t₍₄₂₎ = 5.15, p < .01?

Accepted Answer

A) test statistic 
B) t value 
C) degrees of freedom 
D) significance level 
A) test statistic 
B) t value 
C) degrees of freedom 
D) significance level

Question 6

A researcher wants to create an intervention to improve the well-being of first-semester graduate students, so she gives the professional school counseling students specific doses of rocky road ice cream and the mental health counseling students specific doses of licorice.To analyze the differences in well-being, she would use a(n) _______.

Accepted Answer

A) dependent-samples t-test 
B) analysis of variance 
C) independent-samples t-test 
D) repeated-measures analysis of variance 
A) dependent-samples t-test 
B) analysis of variance 
C) independent-samples t-test 
D) repeated-measures analysis of variance

Question 7

What are you assuming when you use the simple formula for effect size?

Accepted Answer

You are assuming tha

Question 8

If there is no difference between the distributions of scores in two groups, your effect size will be equal to _______.

Accepted Answer

A) 0 
B) 1 
C) 5 
D) 20 
A) 0 
B) 1 
C) 5 
D) 20

Question 9

When examining group difference where the direction of the difference is specified, which of the following is used?

Accepted Answer

A) two-tailed test 
B) one-tailed test 
C) directional hypothesis 
D) critical value 
A) two-tailed test 
B) one-tailed test 
C) directional hypothesis 
D) critical value

Question 10

A t-test may be conducted to detect differences between two groups in which participants are only tested once.

Accepted Answer

A) True 
 B)False

Question 11

A larger effect size represents a greater difference between the two groups.

Accepted Answer

A) True 
 B)False

Question 12

The homogeneity-of-variance assumption is an assumption underlying the t-test that states that the amount of variability in both groups is equal.

Accepted Answer

A) True 
 B)False

Question 13

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

Accepted Answer

A) standard error of mean 
B) effect size 
C) standard deviation 
D) variance 
A) standard error of mean 
B) effect size 
C) standard deviation 
D) variance

Question 14

What does the number 5.15 represent in the following: t₍₄₂₎ = 5.15, p < .01?

Accepted Answer

A) test statistic 
B) t value 
C) degrees of freedom 
D) probability 
A) test statistic 
B) t value 
C) degrees of freedom 
D) probability

Question 15

Effect size is a value that approximates the sample size and is a component of many statistical tests.

Accepted Answer

A) True 
 B)False

Question 16

Please identify the elements of the formula for an independent-means t-test.

Accepted Answer

is the mean for Group 1.is the

Question 17

The t-test for independent means is used when you are looking at the difference in average scores of one or more variables within/between _______ group(s) that are _______ of one another.

Accepted Answer

A) two, dependent 
B) two, independent 
C) one, dependent 
D) one, independent 
A) two, dependent 
B) two, independent 
C) one, dependent 
D) one, independent

Question 18

What is the simplest way to compute an effect size?

Accepted Answer

The simplest way to compute an

Question 19

Independent means that the groups are _______.

Accepted Answer

A) not related in any way 
B) related to each other 
C) dependent 
D) continuous 
A) not related in any way 
B) related to each other 
C) dependent 
D) continuous

Question 20

The t-test for independent samples involves how many groups?

Accepted Answer

A) two 
B) three 
C) more than three 
D) any number of groups 
A) two 
B) three 
C) more than three 
D) any number of groups

Exam 11: Tea for Two: Tests Between the Means of Different Groups

What does the symbol t represent in the following: t₍₄₂₎ = 5.15, p < .01?

In order to compute the test statistic, or t value, you must first approximate the sample size by calculating the _______.

The null hypothesis in an independent-samples t-test would be represented as follows:

The t statistic value is also called the _______.

What does the number 0.01 represent in the following: t₍₄₂₎ = 5.15, p < .01?

What are you assuming when you use the simple formula for effect size?

If there is no difference between the distributions of scores in two groups, your effect size will be equal to _______.

When examining group difference where the direction of the difference is specified, which of the following is used?

A t-test may be conducted to detect differences between two groups in which participants are only tested once.

A larger effect size represents a greater difference between the two groups.

The homogeneity-of-variance assumption is an assumption underlying the t-test that states that the amount of variability in both groups is equal.

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

What does the number 5.15 represent in the following: t₍₄₂₎ = 5.15, p < .01?

Effect size is a value that approximates the sample size and is a component of many statistical tests.

Please identify the elements of the formula for an independent-means t-test.

The t-test for independent means is used when you are looking at the difference in average scores of one or more variables within/between _______ group(s) that are _______ of one another.

What is the simplest way to compute an effect size?

Independent means that the groups are _______.

The t-test for independent samples involves how many groups?

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The t-test for independent means is used when you are looking at the difference in average scores of one or more variables within/between _ group(s) that are _ of one another.