GCU PSY520 Week 7 Discussion (dq1+dq2) Latest 2021 August

PSY520 Graduate Statistics

Week 7 Discussion

DQ1 Review the three "Non Parametric" test videos in the Calculations section of the "Statistics Visual Learner" media piece.

How would you create a statistical analysis based on the scenario below? Explain. What level of significance would you test at and why?

A researcher is examining preferences among four new flavors of ice cream. A sample of n = 80 people is obtained. Each person tastes all four flavors and then picks a favorite. The distribution of preferences is as follows. Do these data indicate any significance preferences among the four flavors using the chi-square test?

Ice Cream Flavor

A             B             C             D

12           18           28           22

DQ2 Describe the differences between parametric and nonparametric tests. Which are more powerful and why? Give an example of a situation where you would select a parametric and a nonparametric test.