Question 1

To determine if you should reject a null hypothesis, you should compare the _______ value and the _______ value.

Accepted Answer

A) estimated; reliable 
B) obtained; estimated 
C) valid; invalid 
D) obtained; critical 
A) estimated; reliable 
B) obtained; estimated 
C) valid; invalid 
D) obtained; critical D

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 C

Question 3

If you want to examine the same group of individuals in two different times, which statistical technique should you select?

Accepted Answer

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

Question 4

If your degrees of freedom is 98, your sample size when conducting a t-test for dependent means must be _______.

Accepted Answer

A) 97 
B) 99 
C) 98 
D) 100 
A) 97 
B) 99 
C) 98 
D) 100

Question 5

Which of the following represents degrees of freedom?

Accepted Answer

A) fd 
B) df 
C) d 
D) f 
A) fd 
B) df 
C) d 
D) f

Question 6

The t-test for dependent means is also known as the t-test for correlated samples.

Accepted Answer

A) True 
 B)False

Question 7

In the equation t₍₇₈₎ = 1.03, p < .01, what does p < .01 represent?

Accepted Answer

A) the obtained value 
B) the critical value 
C) the degrees of freedom 
D) the level of significance 
A) the obtained value 
B) the critical value 
C) the degrees of freedom 
D) the level of significance

Question 8

In the following, what are the degrees of freedom: t₍₂₉₎ = 2.001, p < .05?

Accepted Answer

A) 29 
B) 30 
C) 31 
D) 32 
A) 29 
B) 30 
C) 31 
D) 32

Question 9

_______ describes the average score for each variable in a dependent-samples t-test.

Accepted Answer

A) Mean 
B) Variance 
C) Standard deviation 
D) Standard error 
A) Mean 
B) Variance 
C) Standard deviation 
D) Standard error

Question 10

_______ describes what you may have indicated to be the difference you expect back in a dependent-samples t-test.

Accepted Answer

A) mean difference 
B) hypothesized mean difference 
C) variance difference 
D) degrees of freedom 
A) mean difference 
B) hypothesized mean difference 
C) variance difference 
D) degrees of freedom

Question 11

The t-test for dependent means is used in order to determine whether there is a significant difference in the scores of a group of respondents who are tested at two points in time.

Accepted Answer

A) True 
 B)False

Question 12

What is the formula used to calculate degrees of freedom for a t-test for dependent groups?

Accepted Answer

A) n − 1 
B) n₁ + n₂ − 1 
C) n₁ − 1 + n₂ 
D) n₁ + n₂ 
A) n − 1 
B) n₁ + n₂ − 1 
C) n₁ − 1 + n₂ 
D) n₁ + n₂

Question 13

The t-test for dependent means is used when your sample is tested _______.

Accepted Answer

A) one time 
B) two times 
C) one or more times 
D) two or more times 
A) one time 
B) two times 
C) one or more times 
D) two or more times

Question 14

When considering a t-test for dependent samples, what is a D score?

Accepted Answer

The D score is the d

Question 15

If you are interested in studying the same group under two conditions, what test should you use?

Accepted Answer

A) independent-samples t-test 
B) dependent-samples t-test 
C) related-populations t-test 
D) correlation coefficient 
A) independent-samples t-test 
B) dependent-samples t-test 
C) related-populations t-test 
D) correlation coefficient

Question 16

What is used to examine the degree of the relationship between variables?

Accepted Answer

A) hypothesized mean difference 
B) correlation 
C) observations 
D) variance 
A) hypothesized mean difference 
B) correlation 
C) observations 
D) variance

Question 17

In the equation t₍₇₈₎ = 1.03, p < .01, the number of 78 refers to degrees of freedom.

Accepted Answer

A) True 
 B)False

Question 18

In the equation t₍₇₈₎ = 1.03, p < .01, what does t represent?

Accepted Answer

A) test statistic 
B) degrees of freedom 
C) obtained value 
D) alpha level 
A) test statistic 
B) degrees of freedom 
C) obtained value 
D) alpha level

Question 19

The t-test for dependent means is used when you have _______.

Accepted Answer

A) two groups 
B) one group 
C) three groups 
D) two or more groups 
A) two groups 
B) one group 
C) three groups 
D) two or more groups

Question 20

Early education researchers can match two classrooms from different school districts and analyze their hypothesis with a dependent-samples t-test, even if they are not careful about the characteristics of each classroom.

Accepted Answer

A) True 
 B)False

Exam 12: Tea for Two Again: Tests Between the Means of Related Groups

To determine if you should reject a null hypothesis, you should compare the _______ value and the _______ value.

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

If you want to examine the same group of individuals in two different times, which statistical technique should you select?

If your degrees of freedom is 98, your sample size when conducting a t-test for dependent means must be _______.

Which of the following represents degrees of freedom?

The t-test for dependent means is also known as the t-test for correlated samples.

In the equation t₍₇₈₎ = 1.03, p < .01, what does p < .01 represent?

In the following, what are the degrees of freedom: t₍₂₉₎ = 2.001, p < .05?

_______ describes the average score for each variable in a dependent-samples t-test.

_______ describes what you may have indicated to be the difference you expect back in a dependent-samples t-test.

The t-test for dependent means is used in order to determine whether there is a significant difference in the scores of a group of respondents who are tested at two points in time.

What is the formula used to calculate degrees of freedom for a t-test for dependent groups?

The t-test for dependent means is used when your sample is tested _______.

When considering a t-test for dependent samples, what is a D score?

If you are interested in studying the same group under two conditions, what test should you use?

What is used to examine the degree of the relationship between variables?

In the equation t₍₇₈₎ = 1.03, p < .01, the number of 78 refers to degrees of freedom.

In the equation t₍₇₈₎ = 1.03, p < .01, what does t represent?

The t-test for dependent means is used when you have _______.

Early education researchers can match two classrooms from different school districts and analyze their hypothesis with a dependent-samples t-test, even if they are not careful about the characteristics of each classroom.

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To determine if you should reject a null hypothesis, you should compare the _ value and the _ value.