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. Assume the variances are equal. The etch rates are a follows (in mils per minute): Solution 1 9.6 10.2 9.4 10.3 9.3 9.6 10.0 Solution 2 10.2 10.1 10.3 10.1 10.6 10.2 10.7 10.7 10.3 10.4 10.4 10.5 10.3 (a) Calculate the sample mean for solution 1:₁ = 98.76). i (b) Calculate the sample standard deviation for solution 1: s₁ - = i Round your answer to two decimal places (e.g. Round your answer to three decimal
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. Assume the variances are equal. The etch rates are a follows (in mils per minute): Solution 1 9.6 10.2 9.4 10.3 9.3 9.6 10.0 Solution 2 10.2 10.1 10.3 10.1 10.6 10.2 10.7 10.7 10.3 10.4 10.4 10.5 10.3 (a) Calculate the sample mean for solution 1:₁ = 98.76). i (b) Calculate the sample standard deviation for solution 1: s₁ - = i Round your answer to two decimal places (e.g. Round your answer to three decimal
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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