The Montgomery Athletic Shoe Company has developed a new shoe-sole material it thinks provides superior wear compared
Question:
a. If the populations from which these samples were taken could be considered to have normal distributions, determine if the soles made of the new material have a longer mean lifetime than those made from the old material. Use a significance level of 0.025.
b. Suppose you were not willing to consider that the populations have normal distributions. Make the determination requested in part a.
c. Given only the information in this problem, which of the two procedures indicated in parts a and b would you choose to use? Give reasons for your answer.
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Related Book For
Business Statistics A Decision Making Approach
ISBN: 9780133021844
9th Edition
Authors: David F. Groebner, Patrick W. Shannon, Phillip C. Fry
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