Capella PSYC4700 Week 10 Quiz Latest 2023

Question # 00647057
Subject: Psychology
Due on: 06/06/2023
Posted On: 06/06/2023 02:12 AM
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PSYC4700 - Stat for Behavioral Sciences

Week 10 Quiz 1

Question 1

A researcher measures the extent to which years of marriage predict perceptions of forgiveness. Which factor is the criterion variable in this example?                                           

a. years of marriage

b. perceptions of forgiveness

c. both years of marriage and perceptions of forgiveness

d. none of these

Question 2

The regression equation measures ______.                                      

a. how far the sample mean deviates from the population mean

b. how far each data point deviates from the line that most closely fits the data

c. how significant mean differences are between groups

d. how often scores regress from deviations in the data

Question 3

An estimate of the standard deviation or distance that data points fall from the regression line is measured by the ______.                                               

a. sum of squares

b. standard error of estimate

c. criterion variable

d. predictor variable

Question 4

One key advantage for including multiple predictor variables in the equation of a regression line is that it allows you to ______.                                              

a. detect mean differences between groups for each criterion variable

b. detect the extent to which two or more predictor variables interact

c. show cause-and-effect because many predictor variables are added

d. all of the above

Question 5

A researcher computes an analysis of regression in which MSresidual = 0.82. What is the value of se in this example?                                     

a. 0.67

b. 0.82

c. 0.91

d. there is not enough information to answer this question

Question 6

In addition to evaluating the significance of a multiple regression equation, we also should consider ______.                                     

a. the significance of the residual variability

b. the complexity of the correlation coefficient

c. the relative contribution of each factor

d. the significance of each individual data point

Question 7

The scores or data points for a regression analysis are typically reported in ______.                                        

a. a scatter plot

b. a bar chart

c. a pie chart

d. all of the above

Question 8

Which of the following scales of measurement are analyzed using a nonparametric test?                                             

a. interval and ratio data

b. ordinal and interval data

c. nominal and ordinal data

d. ordinal and ratio data

Question 9

A researcher computes a related-samples sign test in which the number of positive ranks is 9 and the number of negative ranks is 3. The test statistic (x) is equal to ______.                                           

a. 3

b. 9

c. 12

d. There is not enough information to answer this question.

Question 10

Which of the following best explains how to interpret the test statistic for the Wilcoxon signed-ranks T?              

a. The test statistic is interpreted the same as that for the related-samples t test.

b. The larger the value of T, the more likely we are to reject the null hypothesis.

c. The smaller the value of T, the more likely we are to reject the null hypothesis.

d. We reject the null hypothesis when T is less than .05.

Question 11

A researcher finds that the number of positive ranks is 13 and the number of negative ranks is 4 using a sample of 17 participants. Based on these data, what is the decision for a related-samples sign test at a .05 level of significance?                                         

a. retain the null hypothesis

b. reject the null hypothesis

c. there is not enough information to answer this question

Question 12

To compute the test statistic for the Mann-Whitney U test, we sum the ranks in two groups. The test statistic is ______.                                               

a. the larger total

b. the smaller total

c. the average of the two totals

d. the product of the two totals

Question 13

We compare the test statistic of a Kruskal-Wallis H test to the critical value given in the table for which hypothesis test?                                               

a. the analysis of variance

b. the t test

c. the chi-square test

d. the Pearson correlation

Question 14

For the Friedman test, when χ_ R^2 is less than the critical value, we decide to ______.                                               

a. retain the null hypothesis

b. reject the null hypothesis

c. not enough information

Question 15

Each of the following hypothesis tests has a normal approximation formula, except for the ______.      

a. Mann-Whitney U test

b. related-samples sign test

c. Wilcoxon signed-ranks T test

d. Friedman test                                              

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