Exam 1 Part 4

Question 1

To determine normality for a histogram, what should we look at?

Answer 1

Should look reasonably unimodal, symmetric, and bell-shaped.

Question 2

To determine normality for a box plot, what should we look at?

Answer 2

Symmetry, extreme outliers

Question 3

How would you write hypotheses for Levene’s test?

Answer 3

H0: The populations have equal variances
Ha: The population variances are not equal

Question 4

How would you write hypotheses for the Mann Whitney test?

Answer 4

H0: The two population medians are the same
Ha: The two population medians differ