1. Compare and contrast the 4 statistical distributions: z, t, X² and F

a. All 4 are unimodal. True or False?

b. All 4 vary with Degrees of Freedom. True or False?

c. All 4 are bell-shaped if the sample size used is >100. True or False?

2. ANOVA statistical tests are always right tail tests regardless of the question being asked. True or False?

3. You compare 5 different drugs (A, B, C, D, and E) to see which works best at reducing acid in lake water samples. There are 10 lake water samples for each drug. You will compare the mean acid level for each drug at the end of the study.

a. The correct null hypothesis would state that every population mean acid level for every drug is equal to each other. True or False?

b. What would be the degrees of freedom?

c. What would be the correct error degrees of the freedom?

4. You get the following Tukey's Means Comparisons result:

\fTukey Results A B C D Treatment Drug 1 Drug 2 Drug 3 Drug 4 Tukey Results A A A B Treatment Drug 1 Drug 2 Drug 3 Drug 4 Tukey Results A B C A Treatment Drug 1 Drug 2 Drug 3 Drug 4 Tukey Results A B C C Treatment Drug 1 Drug 2 Drug 3 Drug 4