Question 6) A random sample of 12 HIV patients in one clinic was given quality of life instrument. A researcher does not know the distribution of quality of life. She wants to test if the average of the quality of life is different from standard score which is 30. ( each part 3 point , total 12 points)

a.Do you use parametric test or non- parametric test?

1.Yes, we use non-parametric test because sample size is small

2.No, we can use parametric test

b.What statistical test would you use?

1.Sign ranked test

2.Spearman correlation

3.Kruskal -Wallis test.

4.One sample T-test

c.Let say she now have divided her sample two groups of 6 subjects and want to examine if there is difference of quality of life between two groups. What statistical test would you use?

1.Wilcoxon Sign ranked test

2.Spearman correlation

3.Kruskal -Wallis test.

4.One sample T-test

d.Let say she wants to examine the difference of quality of life by three groups of 4. What statistical test would you use?

1. Sign ranked test

2. Spearman correlation

3. Kruskal -Wallis test.

4. One sample T-test