It is desired to determine if there is a difference in the evaluation of the cafeteria service in a company between morning and afternoon shift workers. 15 morning shift workers gave an average grade of 47.73 with a variance of 19,495. 12 evening shift workers gave an average evaluation of 56.5 with a variance of 18,273.
a.with a significance level of 0.01, determine if there is any difference in the variance of the evaluations. find the p-value of the test.
b.with a significance level of 0.01, determine if there is any difference in the average of the evaluations. find the p-value of the test. establish the assumptions needed to validate the tests
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