A manager evaluates effectiveness of major hardware upgrade by running a certain process 5 times before the upgrade (sample X = [12, 8, 6, 29, 57]) and 5 times after it (sample Y = [5, 3, 15, 74, 2]). Based on these data, the average running time is 22.4 minutes before the upgrade, 19.8 minutes after it. Historically, the standard deviation of this Gaussian data has been 2.0975 minutes, and presumably it has not changed. Given z0.025 = 1.96 (i.e. Pr(Z ≥ 1.96) = 0.025; Z is standard normal r.v.),
Answers
Answered by
1
ANSWER;
Based on these data, the average running time is 22.4 minutes
the standard deviation of this Gaussian data has been 2.0975 minutes
Given z0.025 = 1.96
(sample X = [12, 8, 6, process 5 times before the upgrade
Similar questions