11. In semiconductor manufacturing, wet chemical etching is often used to remove silicon from the backs of wafers prior to metalization. The etch rate is an important characteristic in this process and known to follow a normal distribution. Two different etching solutions have been compared, using two random samples of 10 wafers for each solution. The observed etch rates are as follows (in mils per minute): Wafer Solution 1 Solution 2 1 9.9 10.2 2 9.4 10.6 3 9.3 10.7 4 9.6 10.4 5 10.2 10.5 6 10.6 10.0 7 10.3 10.2 8 10.0 10.7 9 10.3 10.4 10 10.1 10.3 Do the data support the claim that the mean etch rate of solution 1 exceeds that of solution 2? In reaching your conclusions, use a-0.05.

11. In semiconductor manufacturing, wet chemical etching is often used to remove silicon from the backs of wafers prior to metalization. The etch rate is an important characteristic in this process and known to follow a normal distribution. Two different etching solutions have been compared, using two random samples of 10 wafers for each solution. The observed etch rates are as follows (in mils per minute): Wafer Solution 1 Solution 2 1 9.9 10.2 2 9.4 10.6 3 9.3 10.7 4 9.6 10.4 5 10.2 10.5 6 10.6 10.0 7 10.3 10.2 8 10.0 10.7 9 10.3 10.4 10 10.1 10.3 Do the data support the claim that the mean etch rate of solution 1 exceeds that of solution 2? In reaching your conclusions, use a-0.05.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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