The thicknesses of n = 41 glass sheets made using process A are measured and the statistics x = 3.04 mm and Sx = 0.124 mm are obtained. In addition, the thicknesses of m = 41 glass sheets made using process B are measured and the statistics, ỹ = 3.12 mm and sy = 0.137 mm are obtained. Use a pooled variance procedure to answer the following questions. (a) Does a two-sided hypothesis test with size a = 0.01 accept or reject the null hypothesis that the two processes produce glass sheets with equal thicknesses on average? (b) What is a two-sided 99% confidence interval for the difference in the average thicknesses of sheets produced by the two processes? (c) Is there enough evidence to conclude that the average thicknesses of sheets produced by the two processes are different?

The thicknesses of n = 41 glass sheets made using process A are measured and the statistics x = 3.04 mm and Sx = 0.124 mm are obtained. In addition, the thicknesses of m = 41 glass sheets made using process B are measured and the statistics, ỹ = 3.12 mm and sy = 0.137 mm are obtained. Use a pooled variance procedure to answer the following questions. (a) Does a two-sided hypothesis test with size a = 0.01 accept or reject the null hypothesis that the two processes produce glass sheets with equal thicknesses on average? (b) What is a two-sided 99% confidence interval for the difference in the average thicknesses of sheets produced by the two processes? (c) Is there enough evidence to conclude that the average thicknesses of sheets produced by the two processes are different?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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