company is interested  in estimating the difference between the avarage time it takes to each process to produce a racquet, they select independent samples from each process. The results of the samples are shown below

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
Problem 25SGR
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Maxforce inc manufactures racquetball racquets by two manufacturing processes (A and B). Because the management of the company is interested  in estimating the difference between the avarage time it takes to each process to produce a racquet, they select independent samples from each process. The results of the samples are shown below 

                                                     Process A                    Process B

Sample size                                   32                                  35

sample mean (in min)                   43                                  47

Population standard deviation.     8                                   8.5

1. Develop a confidence interval estimate for the difference between the avarage time of the two process.

2. Is there a conclusive evidence that one process takes longer than the other?Use both critical value and the p- value approach

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