Homework no answers - CHAPTER 10COMPARISONS INVOLVING...

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CHAPTER 10—COMPARISONS INVOLVING MEANS, EXPERIMENTAL DESIGN, AND ANALYSIS OF VARIANCE 1. Maxforce, Inc. manufactures racquetball racquets by two different manufacturing processes (A and B). Because the management of this company is interested in estimating the difference between the average time it takes 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 minutes) 43 47 Population Variance ( σ 2 ) 64 70 a. Develop a 95% confidence interval estimate for the difference between the average times of the two processes. b. Is there conclusive evidence to prove that one process takes longer than the other? If yes, which process? Explain. 2. Consider the following results for two samples randomly taken from two normal populations with equal variances. Sample I Sample II Sample Size 28 35 Sample Mean 48 44 Population Standard Deviation 9 10 a. Develop a 95% confidence interval for the difference between the two population means.
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Homework no answers - CHAPTER 10COMPARISONS INVOLVING...

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