PSYC515 QUIZ 5 - NON-PARAMETRIC TESTS CONCEPTS

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Liberty University *

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PSYC 515

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Statistics

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Feb 20, 2024

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Instructions The quiz:  Covers the Learn material from Module 5: Week 5 .  Contains 25 multiple-choice questions .  Is limited to 90 minutes .  Allows 1 attempt .  Is worth 50 points . This quiz is designed to assess understanding of content from this week’s topics covered in the Learn section (non-cumulative) and will not require use of SPSS. You have 90 minutes to complete these 25 questions. This allows for judicious use of time to refer to assigned readings and presentations (open book / open notes), but should be completed with no other forms of collaboration. Please note: that the first question asks you to indicate your agreement to abide by LUO's Online Honor Code. Answering this question is required . Submit this assignment by 11:59 p.m. (ET) on Sunday of Module 5: Week 5. Attempt History Attempt Time Score LATEST Attempt 1 23 minutes 40 out of 50 Correct answers are hidden. Score for this quiz: 40 out of 50 This attempt took 23 minutes. Question 1 0 / 0 pts I have read and understand the Academic Honor policy as outlined in the Online Honor Code for Liberty University Online. I agree to abide by this policy and that the work submitted herein is my own. Yes No Incorrect Question 2

0 / 2 pts Nonparametric is to parametric as _____ is to _____. t test; z test – WRONG z test; t test χ 2 test; t test t test; χ 2 test Answer is found in the Jackson textbook, ch. 14 Incorrect Question 3 0 / 2 pts Which of the following is not an assumption of the Wilcoxon rank-sum test? The data are ratio, interval, or ordinal in scale—all of which must be converted to ranked (ordinal) data before conducting the test. – WRONG The underlying distribution is not normal. The observations are independent. There is homogeneity of variance. Answer is found in the Jackson textbook, ch. 14 Question 4 2 / 2 pts

Chi-square is calculated by summing the [(_____ - _____) 2 divided by _____]. observed; expected; observed expected; observed; observed observed; expected; expected observed; observed; expected Question 5 2 / 2 pts Chi-square tests are to _____ data as Wilcoxon tests are to _____ data. ordinal; interval nominal; ordinal ordinal; nominal ratio, ordinal Question 6 2 / 2 pts When using the Wilcoxon tests, the obtained value must be ______ the critical value in order to establish statistical significance. less than or equal to

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greater than or equal to greater than equal to Question 7 2 / 2 pts The calculation of the df for the χ 2 test of independence is r x c - 1. (r-1)(c-1). (r-c) n . r x c. Question 8 2 / 2 pts Which of the following is true regarding the χ 2 test of independence? It requires a numerical (quantitative) score for each individual. The sample must be random. Population parameters such as m and s must be known. The observations must not be independent.

Question 9 2 / 2 pts The nonparametric equivalent to the one-way repeated measures ANOVA is the _____ test. Chi-square t Friedman test Kruskal-Wallis Question 10 2 / 2 pts The _____ is a nonparametric inferential test for comparing sample medians of two dependent or related groups of scores. Wilcoxon matched-pairs signed-ranks T test Wilcoxon rank-sum test χ 2 test for independence χ 2 goodness-of-fit test Question 11 2 / 2 pts

Which of the following is not an assumption of the χ 2 goodness-of-fit test? It is a nonparametric test. It is appropriate only for ordinal data. The frequency in each cell should be at least 5. The sample should be randomly selected. Question 12 2 / 2 pts Which of the following is not an assumption of the Wilcoxon matched-pairs signed-ranks T test? The data are ratio, interval or ordinal in scale, all of which must be converted to ranked (ordinal) data before conducting the test. The underlying distribution is not normal. The observations are independent. The other alternatives are all assumptions of the Wilcoxon matched-pairs signed-ranks test. Question 13 2 / 2 pts The χ 2 test of independence is used with _____ data. continuous

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categorical ordinal quantitative Question 14 2 / 2 pts The nonparametric equivalent to the One-way (between subjects / randomized) ANOVA is: Wilcoxon matched-pairs signed ranks t test Wilcoxon rank sum test Kruskal-Wallis test Friedman test Question 15 2 / 2 pts If parametric assumptions are violated for a study in which 30 participants are randomly assigned to one of three caffeine conditions (none, moderate, or high caffeine) before completing a memory task, which test is most appropriate? Kruskal-Wallis test Friedman test Wilcoxon rank sum test Wilcoxon matched-pairs signed ranks t test Question 16 2 / 2 pts If you wanted to see if pet preference in your region is similar to widely available state averages for the following categories: dog, cat, rodent, bird, horse, calculate your degrees of freedom.

2 3 4 5 Question 17 2 / 2 pts Which test is most appropriate for nominal data? Wilcoxon matched-pairs signed ranks t test Chi square goodness of fit Friedman test Wilcoxon rank sum test Question 18 2 / 2 pts If parametric test assumptions are violated for a study in which 20 participants completed an attention task twice — once after consuming a sugar pill and once after consuming a pill that contained 25 mg nicotine, which test would be most appropriate? Kruskal-Wallis test Friedman test Wilcoxon rank sum test Wilcoxon matched-pairs signed ranks t test

Incorrect Question 19 0 / 2 pts What type of test does not require the use of population parameters? ANOVA parametric nonparametric t-tests – WRONG Question 20 2 / 2 pts If you wanted to see if pet preference in your region is similar to the state averages, which test would you conduct? Wilcoxon rank sum test Chi square test of independence Chi square goodness-of-it Wilcoxon matched-pairs signed ranks t test Question 21 2 / 2 pts What test compares observed nominal data against what we would expect based on previous knowledge)? Wilcoxon rank sum test Chi square test of independence

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Chi square goodness-of-it Wilcoxon matched-pairs signed ranks t test Question 22 2 / 2 pts Imagine you wanted to examine dating site preferences to see if the category gender (male / female) influences the category variable of target age of dating match (younger, same age, or older). Calculate the degrees of freedom needed to look up the critical value. 2 3 4 5 Incorrect Question 23 0 / 2 pts The nonparametric equivalent to the One-way repeated measures ANOVA is: Wilcoxon matched-pairs signed ranks t test Wilcoxon rank sum test Kruskal-Wallis test – WRONG Friedman test Incorrect Question 24 0 / 2 pts Which of the following statements is true about nonparametric tests?

uses means to compare – WRONG underlying distribution must be normal more assumptions than parametric tests does not assume data follows a specific distribution Question 25 2 / 2 pts If you wanted to examine dating site preferences to see if the category gender (male / female) influences the category variable of target age of dating match (younger, same age, or older), which statistical test would be most appropriate? Wilcoxon rank sum test Chi square test of independence Chi square goodness-of-it Wilcoxon matched-pairs signed ranks t test Question 26 2 / 2 pts The nonparametric equivalent to the correlated groups t-test is: Wilcoxon matched-pairs signed ranks t test Wilcoxon rank sum test Kruskal-Wallis test Friedman test

Quiz Score: 40 out of 50

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