American College of California Week 7 Non Parametric Test Methods Videos Discussion

Description

1 – Review the three “Non-parametric” test videos in theCalculations section of the “Statistics Visual Learner” media piece.

http://lc.gcumedia.com/hlt362v/the-visual-learner/the-visual-learner-v2.1.html

A researcher is examining preferences among four new flavors of ice cream. Asample of n = 80 people is obtained. Each person tastes all four flavors andthen picks a favorite. The distribution of preferences is as follows. Do thesedata indicate any significance preferences among the four flavors? Test at the.05 level of significance.

Ice Cream Flavor

A	B	C	D
12	18	28	22

2- Is it true that parametric tests are generally more powerful thannonparametric tests? If so, give two reasons why you might choose to usea nonparametric test instead of a parametric test.

3 – Parametric vs Nonparametric

Discuss the difference between parametric test and non-parametric test. When do we use a non-parametric test?

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