Question 1

How many observations are there for each case in a t test for dependent samples?
A)one
B)two
C)three
D)more than three

Accepted Answer

In a t test for dependent samples, there are two observations for each case, as the test compares the means of two related groups or conditions.

Question 2

In the equation t₍₇₈₎ = 1.03,p < 0.01,what does t represent? A)test statistic B)degrees of freedom C)obtained value D)alpha level

Accepted Answer

t represents the test statistic in the given equation.

Question 3

In the equation t₍₇₈₎ = 1.03,p < 0.01,what does 78 represent? A)test statistic B)degrees of freedom C)obtained value D)alpha level

Accepted Answer

78 represents the degrees of freedom, which is a parameter often used in statistical tests to determine the number of independent values in a calculation that can vary.

Question 4

In the formula for the t test for dependent means,what does the n represent?
A)sum of the means
B)number of participants
C)number of pairs of observations
D)sum of all scores

Accepted Answer

The n represents the number of pairs of observations (i.e., the number of participants who were measured twice in the same study condition).

Question 5

When running a t test for dependent means on a group of 96 individuals,the degrees of freedom will be ______.
A)94
B)95
C)96
D)90

Accepted Answer

When running a t test for dependent means, the degrees of freedom will be the sample size minus 1. Since this involves a group of 96 individuals, the degrees of freedom will be 96-1=95. Therefore, the correct answer is B.

Question 6

What test is used when you are interested in studying the same group under two conditions?
A)independent-samples t test
B)correlation coefficient
C)related-populations t test
D)dependent-samples t test

Accepted Answer

The dependent-samples t test is used when studying the same group under two conditions, as it compares the means of two related groups. This is the best choice as it specifically addresses the scenario given in the question.

Question 7

What is the term used to examine the degree of the relationship between variables?
A)hypothesized mean difference
B)correlation
C)observations
D)variance

Accepted Answer

The term used to examine the degree of the relationship between variables is correlation. Correlation measures the strength and direction of the relationship between two variables, indicating how closely they are related. The other options, hypothesized mean difference, observations, and variance, are not directly related to examining the degree of relationships between variables.

Question 8

Which of the following relates to the difference you expect when conducting a t test?
A)hypothesized mean difference
B)Pearson correlation
C)observations
D)variance

Accepted Answer

The hypothesized mean difference is the difference in means that you expect to find between two groups or conditions, which is the central focus of a t test.

Question 9

In the equation t₍₇₈₎ = 1.03,p < 0.01,what does p < 0.01 represent? A)the obtained value B)the critical value C)the degrees of freedom D)the level of significance

Accepted Answer

"p < 0.01" represents the level of significance, meaning that there is a 1% chance that the results occurred by chance. This is important in determining the statistical significance of the results.

Question 10

Dr.Moo would like to find out if there was a significant difference between male and female patients' anxiety scores.What is the appropriate test to run?
A)independent-samples t test
B)factorial ANOVA
C)dependent-samples t test
D)Pearson correlation

Accepted Answer

The appropriate test to run for comparing the anxiety scores of male and female patients is the independent-samples t test, which compares the means of two independent groups. This test will determine whether there is a statistically significant difference in the anxiety scores between the two groups.

Question 11

In the equation t₍₇₈₎ = 1.03,p < 0.01,what does 1.03 represent? A)test statistic B)degrees of freedom C)obtained value D)alpha level

Accepted Answer

The obtained value of 1.03 represents the result of the statistical test and indicates that there is a significant difference between the groups being compared (p < 0.01).

Question 12

When calculating a dependent-samples t test,the order in which you input the posttest score and pretest score can change the t value.If you input the pretest first,the obtained value will be ______.
A)positive
B)negative
C)neutral
D)invalid

Accepted Answer

The sign of the t statistic in a dependent-samples t test depends on which scores are subtracted from the other. If the posttest score is subtracted from the pretest score, the resulting t value will be negative, indicating that the pretest score was significantly greater than the posttest score. If the pretest score is subtracted from the posttest score, the resulting t value will be positive, indicating that the posttest score was significantly greater than the pretest score. Therefore, choice B is the correct answer.

Question 13

According to the equation t₍₇₈₎ = 1.03,p < 0.01,what is the size of the group? A)77 B)78 C)79 D)80

Accepted Answer

The subscript (78) indicates the degrees of freedom, which is typically the sample size minus one. Therefore, the group size is 79.

Question 14

Which of the following represents degrees of freedom?
A)fd
B)df
C)d
D)f

Accepted Answer

df stands for degrees of freedom in statistics.

Question 15

In running a t test for dependent means on a group of individuals,how many individuals are there in the group when the degree of freedom is 58?
A)57
B)58
C)59
D)60

Accepted Answer

The degree of freedom for a t test for dependent means is calculated as (N-1), where N is the number of individuals in the group. Therefore, 58 = N-1, which gives N = 59.

Question 16

Dr.Moo would like to find out if there was a significant difference between her patients' anxiety scores before and after they completed a yoga program.What is the appropriate test to run?
A)independent-samples t test
B)factorial ANOVA
C)dependent-samples t test
D)Pearson correlation

Accepted Answer

Since Dr. Moo is measuring anxiety scores before and after completion of the yoga program for the same group of patients, the appropriate test to run is a dependent-samples t test. This test will allow Dr. Moo to compare the mean anxiety scores before and after the program within the same group of patients and determine if the difference is statistically significant.

Question 17

What is the numerator of the t test in the dependent-means formula? A)$\Sigma$D B)n C)M₁ - M₂ D)$\Sigma$D²(n - 1)

Accepted Answer

The numerator of the t test in the dependent-means formula is F1F1F1S1F1F1F10D.

Question 18

If your degrees of freedom is 98,your sample size when conducting a t test for dependent means must be ______.
A)96
B)97
C)98
D)99

Accepted Answer

In a t-test for dependent means, the degrees of freedom (df) are calculated as the sample size (n) minus 1. Therefore, if df = 98, then n - 1 = 98, which means n = 99.

Question 19

When using a t test for dependent means,what is true of the sample?
A)There are two different groups.
B)They are the same group.
C)There are more than 50.
D)They are observed once.

Accepted Answer

When using a t test for dependent means, the sample consists of one group that is observed twice. Therefore, option B is correct. Options A and C do not apply to this type of test. Option D is also incorrect because the group is observed twice.

Question 20

What is another name for a dependent-samples t test?
A)single sample
B)double measures
C)repeated measures
D)freed sample

Accepted Answer

A dependent-samples t test is also known as a repeated measures t test because it is used on two sets of measurements that are taken from the same participants, thus making them dependent on each other.

Quiz 12: Teafor Two Again: Tests Between the Means of Related Groups

How many observations are there for each case in a t test for dependent samples?

In the equation t(78) = 1.03,p < 0.01,what does t represent?

In the equation t(78) = 1.03,p < 0.01,what does 78 represent?

In the formula for the t test for dependent means,what does the n represent?

When running a t test for dependent means on a group of 96 individuals,the degrees of freedom will be ______.

What test is used when you are interested in studying the same group under two conditions?

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

Which of the following relates to the difference you expect when conducting a t test?

In the equation t(78) = 1.03,p < 0.01,what does p < 0.01 represent?

Dr.Moo would like to find out if there was a significant difference between male and female patients' anxiety scores.What is the appropriate test to run?

In the equation t(78) = 1.03,p < 0.01,what does 1.03 represent?

When calculating a dependent-samples t test,the order in which you input the posttest score and pretest score can change the t value.If you input the pretest first,the obtained value will be ______.

According to the equation t(78) = 1.03,p < 0.01,what is the size of the group?

Which of the following represents degrees of freedom?

In running a t test for dependent means on a group of individuals,how many individuals are there in the group when the degree of freedom is 58?

Dr.Moo would like to find out if there was a significant difference between her patients' anxiety scores before and after they completed a yoga program.What is the appropriate test to run?

What is the numerator of the t test in the dependent-means formula?

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

When using a t test for dependent means,what is true of the sample?

What is another name for a dependent-samples t test?

In the equation t₍₇₈₎ = 1.03,p < 0.01,what does t represent?

In the equation t₍₇₈₎ = 1.03,p < 0.01,what does 78 represent?

In the equation t₍₇₈₎ = 1.03,p < 0.01,what does p < 0.01 represent?

In the equation t₍₇₈₎ = 1.03,p < 0.01,what does 1.03 represent?

According to the equation t₍₇₈₎ = 1.03,p < 0.01,what is the size of the group?