Exam 3 Homework Questions

Question 1

What is the assumption that the amount of variability in each of the two groups is equal?

Answer 1

Homogeneity of Variance

Question 2

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

Answer 2

Degrees of Freedom

Question 3

A researcher wants to compare 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) ______________________.

Answer 3

Independent Samples T-Test

Question 4

If the number of participants in group one = 32 and the number in group two = 30, what is the associated degrees of freedom?

Answer 4

60

Question 5

If you want to examine the difference between the average scores of three unrelated groups, which of the following statistical techniques should you select?

Answer 5

Analysis of Variance

Question 6

If the obtained value is greater than the critical value, what should you do?

Answer 6

Reject the Null Hypothesis

Question 7

If the number of participants in group one = 54 and the number in group two = 58, what is the associated degrees of freedom?

Answer 7

110

Question 8

What is considered to be a small effect for Cohen’s d?

Answer 8

0.17

Question 9

In order to determine whether or not you will reject the null hypothesis, the test statistic must be compared against the ___________.

Answer 9

Critical Value

Question 10

The t statistic value is also called the _____________.

Answer 10

Obtained Value

Question 11

Which major assumption of the t test deals with the amount of variability in each group?

Answer 11

Variances are equal

Question 12

Imagine you are looking up a critical t value in a t table. If your observed t value for the degrees of freedom lies between two critical values in the table, to be conservative you would select __________________________.

Answer 12

The smaller value

Question 13

A measure of how different two groups are from one another in their magnitude is the __________.

Answer 13

Effect Size

Question 14

The t test for independent means is used when each group is tested ____________.

Answer 14

Only Once

Question 15

What does the number 58 represent in the following: t(58) = 2.001, p < .05?

Answer 15

Degrees of Freedom

Question 16

If your obtained t value is 7.14 and the critical value is 6.10, what decision should you make?

Answer 16

Reject the Null Hypothesis

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 between _______ groups that are ____________ of one another.

Answer 17

two, independent

Question 18

In the t test for independent samples, the actual statistical test is__________________.

Answer 18

Nondirectional

Question 19

When computing effect size, the sample size is ________.

Answer 19

Not taken into account

Question 20

That same researcher had a third group of students—those studying College Student Affairs—who the faculty thought ought to be tested in the next study. The researcher decided to give the first-semester College Student Affairs graduate students specific doses of chewy fruit-flavored candies for their treatments. Now what test statistic would she need to use to evaluate the difference in effectiveness between the groups?

Answer 20

Analysis of Variance

Question 21

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

Answer 21

Pearson Correlation

Question 22

If you are running a t-test for dependent means on a group of 54 individuals, your degrees of freedom will be:

Answer 22

53

Question 23

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

Answer 23

29

Question 24

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

Answer 24

They are the same group

Question 25

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

Answer 25

Two

Question 26

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

Answer 26

99

Question 27

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

Answer 27

Dependent Samples t-test

Question 28

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

Answer 28

Paired Sample

or correlated sample

Question 29

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

Answer 29

The level of significance

Question 30

Based on the formula for the t-test for dependent means, what does the “n” represent?

Answer 30

Number of pairs of observations

Question 31

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

Answer 31

One group

Question 32

In order to be 99% confident you have not committed a Type I error, at what level should you set your p value?

Answer 32

0.01

Question 33

How many subjects were examined based on the following: t(29) = 2.001, p < .05?

Answer 33

30

Question 34

The t-test for dependent means is used when your sample is tested at:

Answer 34

Two times

Question 35

If the obtained value is greater than the critical value, what should you do?

Answer 35

Reject the Null Hypothesis

Question 36

In a t-test for dependent samples that examines the difference between a pretest and posttest, what type of hypothesis is used?

Answer 36

Directional

Question 37

If you want to examine one group of subjects under two different conditions, which statistical technique should you select?

Answer 37

Dependent Samples t-test

Question 38

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

Answer 38

Degrees of Freedom

Question 39

In order to determine whether or not you will reject the null hypothesis, the test statistic must be compared against the ___________.

Answer 39

Critical Value

Question 40

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

Answer 40

Hypothesized Mean Difference