Question: Perform pool t test for each ASSUME EQUAL VARIANCES FOR THE FOLLOWING PROBLEM. 15. Are Quarters Now Lighter? Weights of quarters are carefully considered in

Perform pool t test for eachASSUME EQUAL VARIANCES FOR THE FOLLOWING PROBLEM. 15. Are Quarters Now Lighter? Weights of quarters are carefully considered in the design of the vending machines that we have all come

Perform pool t test for each

ASSUME EQUAL VARIANCES FOR THE FOLLOWING PROBLEM.

to know and love. Data Set 29 "Coin Weights" in Appendix B

includes weights of a sample of pre-1964 quarters (n = 40, X

= 6.19267 g. s = 0.08700 g) and weights of a sample

of post-1964 quarters (n = 40, x = 5.63930 g. s =

15. Are Quarters Now Lighter? Weights of quarters are carefully considered in the design of the vending machines that we have all come to know and love. Data Set 29 "Coin Weights" in Appendix B includes weights of a sample of pre-1964 quarters (n = 40, X = 6.19267 g. s = 0.08700 g) and weights of a sample of post-1964 quarters (n = 40, x = 5.63930 g. s = 0.06194 g). a. Use a 0.05 significance level to test the claim that pre-1964 quarters have a mean weight that is greater than the mean weight of post-1964 quarters.17. Are Male Professors and Female Professors Rated Differently? Listed below are student evaluation scores of female professors and male professors from Data Set 17 "Course Evaluations" in Appendix B. Test the claim that female professors and male professors have the same mean evaluation ratings. Does there appear to be a difference? Females 4,4 3.4 4.8 2.9 4.4 4.9 3.5 3.7 3.4 4.8 Males 4.0 3.6 4.1 4.1 3.5 4.6 4.0 4.3 4.5 4.3

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