1. What are the most common reasons you would select a non-parametric test over the parametric alternative?
2. Discuss the issue of statistical power in non-parametric tests (as compared to their parametric counterparts). Which type tends to be more powerful? Why?
3. For each of the following parametric tests, identify the appropriate non-parametric counterpart:
a. Dependent t-test
b. Independent samples t-test
c. Repeated measures ANOVA (one-variable)
d. One-way ANOVA (independent)
e. Pearson Correlation
Part B. SPSS Activity
In this part of Activity #7, you will perform the non-parametric version of the tests you used in previous activities. In each case, assume that you opted to use the non-parametric equivalent rather than the parametric test. Using the data files from earlier activities, complete the following tests and paste your results into the assignment Word document:
1. Activity 5a: non-parametric version of the dependent t-test
Part A. Dependent t-testIn this activity, we are interested in finding out whether participation in a creative writing course results in increased scores of a creativity assessment. For this part of the activity, you will be using the data file “Activity 5a.sav”. In this file, “Participant” is the numeric student identifier, “CreativityPre” contains creativity pre-test scores, and “CreativityPost” contains creativity post-test scores. A total of 40 students completed the pre-test, took the creativity course, and then took the post-test.
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Activity #7 You will submit one Word document for this activity. In the first part your activity #7 document, provide short answers to the following questions (250 words or less). Part A. Questions about non-parametric procedures 1. What are the most common reasons you would select a non-parametric test over the parametric alternative? 2. Discuss the issue of statistical power in non-parametric tests (as compared to their parametric counterparts). Which type tends to be more powerful? Why? 3. For each of the following parametric tests, identify the appropriate non-parametric counterpart: a. Dependent t-test b. Independent samples t-test c. Repeated measures ANOVA (one-variable) d. One-way ANOVA (independent) e. Pearson Correlation Part B. SPSS Activity In this part of Activity #7, you will perform the non-parametric version of the tests you used in previous activities. In each case, assume that you opted to use the non-parametric equivalent rather than the parametric test. Using the data files from earlier activities, complete the following tests and paste your results into the assignment Word document: 1. Activity 5a: non-parametric version of the dependent t-test Part A. Dependent t-test In this activity, we are interested in finding out whether participation in a creative writing course results in increased scores of a creativity assessment. For this part of the activity, you will be using the data file “Activity 5a.sav”. In this file, “Participant” is the numeric student identifier, “CreativityPre” contains creativity pre-test scores, and “CreativityPost” contains creativity post-test scores. A total of 40 students completed the pre-test, took the creativity course, and then took the post-test. 1. Exploratory Data Analysis/Hypotheses. a. Perform exploratory data analysis on CreativityPre and CreativityPost. Using SPSS, calculate the mean and standard deviation of these two variables. b. Construct an...