Question 1

Which of the following statistical tests would be appropriate for a between-subjects study?

Group of answer choices

1. independent measures t-test
2. one-sample t-test
3. z-score test statistic

Question 2

A clinical psychologist is examining the effects of therapy on depression. She has a sample of 30 patients who have a baseline depression score of 10 (higher scores indicate greater depression). After three months of therapy, she assesses their depression, which is now an average of 6. Which statistical test should she use?

Group of answer choices

1. independent measures t-test
2. ANOVA
3. repeated measures t-test

Question 3

Imagine a researcher who wanted to assess whether graduate students in psychology differ in their preference for careers compared to graduate students in economics. Graduate students in psychology and graduate students in economics were each asked to choose between an academic job or an applied/industry job. The researcher wanted to know if graduate students in those two fields differed in their choice of an academic or applied career. Which statistical test would be most appropriate?

Group of answer choices

1. chi-square test for independence
2. repeated measures t-test
3. independent measures t-test
4. ANOVA

Question 4

The SAT verbal test has a population mean of 500 and a population standard deviation of 100. Fifty students at the University of Idaho are sampled and they report an average SAT verbal score of 535. An institutional researcher would like to determine if the UI students have a significantly higher mean on the SAT verbal test. What statistical test would be used?

Group of answer choices

1. repeated measures t-test
2. z-score test statistic
3. ANOVA
4. one sample t-test

Question 5

Professor Davey was interested in the role of mood on the degree of compulsive checking in which a person engaged. Three groups of 10 participants each listened to music designed to induce a positive, negative, or neutral mood. They were then asked to "list as many things around your home that you should check for safety or security reasons before you go away" for three weeks. To determine if the mood had a significant effect on the number of items listed, what statistical test should Professor Davey use?

Group of answer choices

1. chi-square goodness of fit test
2. independent measures t-test
3. repeated measures t-test
4. ANOVA

Question 6

A researcher wanted to examine whether bike helmets encourage safer or riskier behavior. Participants were randomly assigned to one of two conditions, where they either wore a bike helmet (bike helmet condition) or did not wear a bike helmet (no bike helmet condition). Participants were then observed on an outdoor course that involved several obstacles. The researcher examined the time it took each rider to complete the course. What statistical test should be used?

Group of answer choices

1. repeated measures t-test
2. z-score test statistic
3. independent measures t-test
4. one-sample t-test

Question 7

Coach Smith has a team of 20 male basketball players with an average height of 74 inches and a standard deviation of 4. He knows that the population mean height for men is 70 inches. What statistical test would he used to determine if his players are significantly taller than the population mean?

Group of answer choices

1. ANOVA
2. z-score test statistic
3. one sample t-test
4. independent measures t-test

Question 8

Professor Darley recorded the speed with which subjects summoned help for a person in trouble. Subjects thought either that they were the only one listening to the person (Group 1), that one other person was listening (Group 2), or that four other people were listening (Group 3). The dependent variable was the speed with which the person summoned help. What statistical test should be used?

Group of answer choices

1. repeated measures t-test
2. independent measures t-test
3. chi-square test for independence
4. ANOVA

Question 9

Unlike the standard deviation, the standard error focuses on a ___.

Group of answer choices

1. sampling distribution
2. sample
3. population

Question 10

A sample of data is positively skewed. The researcher converts the data to z-scores. The distribution of z-scores will be ___.

Group of answer choices

1. negatively skewed
2. positively skewed
3. normally distributed

Question 11

A university researcher examined students' preferences for types of classes. A sample of 120 students were asked to choose which of three class types (in-person, online, or hybrid) they most preferred (they could only select one of the three). The researcher tested whether one class type was more preferred compared to the other types. Which statistical test is most appropriate?

Group of answer choices

1. ANOVA
2. chi-square test for independence
3. chi-square goodness of fit test
4. independent measures t-test

Question 12

An institutional researcher was interested in comparing the GPAs of students. He compared the average GPA of students living in the Greek system to the average GPA of students living in residence halls. Which statistical test should he use?

Group of answer choices

1. one-sample t-test
2. repeated measures t-test
3. independent measures t-test

Question 13

Thirty students are tested on a test of complex problem-solving. Their average performance was 10 correct with a standard deviation of 3. The population means for the test is 8. What statistical test should be used to determine if the students differ from the population?

Group of answer choices

1. z-score test statistic
2. independent measures t-test
3. repeated measures t-test
4. one sample t-test

Question 14

A research design that involves collecting data from the same people multiple times is called _______.

Group of answer choices

1. within-subjects
2. between-subjects
3. independent measures

Question 15

When conducting an inferential statistical test, we want the standard error to be ___.

Group of answer choices

1. small
2. large
3. size of standard error doesn't affect the test

Question 16

A researcher conducts a statistical test and finds a p-value less than .05. The researcher rejects the null hypothesis. If the null hypothesis was in fact true, then the researcher has made a __.

Group of answer choices

1. correct decision
2. Type I error
3. Type II error

Question 17

A researcher is interested in testing whether men and women differ on depression. One hundred men and one hundred women were surveyed and asked to fill out a scale assessing depression. The mean depression score for men was compared to the mean depression score for women. Which statistical test should the researcher use?

Group of answer choices

1. one sample t-test
2. z-score test statistic
3. independent measures t-test
4. repeated measures t-test

Question 18

A researcher was interested in examining whether there were race differences in home ownership. A sample of 1,000 people responded to a survey where they reported their race (White/Caucasian, Black/African American or Asian) and whether or not they owned a home (yes or no). Which statistical test should the researcher use?

Group of answer choices

1. repeated measures t-test
2. chi-square test for independence
3. independent measures t-test
4. ANOVA

Question 19

Professor Jones gives her class of 50 students a test covering the major topics of the course on the first day of class. On the last day of class, she gives the students the same test to see if their performance has improved. What statistical test should be used?

Group of answer choices

1. one sample t-test
2. independent measures t-test
3. z-score test statistic
4. repeated measures t-test

Question 20

The McDonald Impulsivity Test has a population mean of 40 and a population standard deviation of 10. A sample of 20 high school students complete the test with a mean of 50. What statistical test should be used to determine if the high school students differ significantly from the population mean?

Group of answer choices

1. z-score test statistic
2. one sample t-test
3. independent measures t-test
4. repeated measures t-test

Question 21

The following table shows the results of an analysis of variance comparing 3 treatment conditions with a sample ofn= 25 participants in each treatment. What is the missing value for theF-ratio?

Source	SS	df	MS
Between	XX	XX	20	F=XX
Within	XX	XX	XX
Total	184	XX

Group of answer choices

1. 5
2. 10
3. 15
4. 20

Question 22

In general, what factors are most likely to reject the null hypothesis for an ANOVA?

Group of answer choices

1. Large mean differences and large variances
2. Large mean differences and small variances
3. Small mean differences and small variances
4. Small mean differences and large variances