You have been asked to determine if two different production processes have different mean numbers of units
Question:
H0: µ1 – µ2 ≤0
H1: µ1 - µ2 > 0
The process variances are unknown but assumed to be equal. Using random samples of 25 observations from process 1 and 36 observations from process 2, the sample means are 56 and 50 for populations 1 and 2, respectively. Can you reject the null hypothesis using a probability of Type I error a = 0.05 in each case?
a. The sample standard deviation from process 1 is 30 and from process 2 is 28.
b. The sample standard deviation from process 1 is 22 and from process 2 is 33.
c. The sample standard deviation from process 1 is 30 and from process 2 is 42.
d. The sample standard deviation from process 1 is 15 and from process 2 is 36.
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Related Book For
Statistics For Business And Economics
ISBN: 9780132745659
8th Edition
Authors: Paul Newbold, William Carlson, Betty Thorne
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