Question 2-1

It has been suggested that the evening-class students showmore variabilityin their scores than the morning-class students. To test whether this hypothesis is true, the teacher collect samples to test the hypothesis. Below, you are given the results of two independent random samples. Use = 0.05.

Morning Class

Evening Class

Sample Size

12

10

Sample Mean

89

84

Sample Variance

10

14

a) Formulate the hypotheses.

Question 2-2

Following the information in 2a, calculate the test statistics (F value) and find critical value to test the hypotheses. What is the conclusion?