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5. The thicknesses of n = 41 glass sheets made using process A are mea- sured and the statistics = 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 y = 3.12 mm and sy = 0.137 mm are obtained. Assuming that the two population variances are equal, 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? d) Construct a 90% confidence interval for the ratio of the variances of the thicknesses of glass sheets produced by the two processes.

5. The thicknesses of n = 41 glass sheets made using process A are mea- sured and the statistics = 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 y = 3.12 mm and sy = 0.137 mm are obtained. Assuming that the two population variances are equal, 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? d) Construct a 90% confidence interval for the ratio of the variances of the thicknesses of glass sheets produced by the two processes.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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5. The thicknesses of n = 41 glass sheets made using process A are mea- sured and the statistics = 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 y = 3.12 mm and sy = 0.137 mm are obtained. Assuming that the two population variances are equal, 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? d) Construct a 90% confidence interval for the ratio of the variances of the thicknesses of glass sheets produced by the two processes.
Transcribed Image Text:5. The thicknesses of n = 41 glass sheets made using process A are mea- sured and the statistics = 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 y = 3.12 mm and sy = 0.137 mm are obtained. Assuming that the two population variances are equal, 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? d) Construct a 90% confidence interval for the ratio of the variances of the thicknesses of glass sheets produced by the two processes.
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