1.3. Find the estimated standard error of the proportion if, in the sample of machines, 36 machines had produced paper that is thicker than the average. Is this a good estimate? 1.4. Find the estimated variance of the sample mean and its appropriate standard error. Explain your answer.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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Question 1
A paper company has about 50 paper mills distributed over 3 provinces. The 50 papermills have a total
of 600 machines. Lately it was found that some of the paper the company produces has a thickness
above the specification of 2mm. From historical data it was found that the mean paper thickness 1.3mm
the variance of 2. Answer the following questions.
Transcribed Image Text:Question 1 A paper company has about 50 paper mills distributed over 3 provinces. The 50 papermills have a total of 600 machines. Lately it was found that some of the paper the company produces has a thickness above the specification of 2mm. From historical data it was found that the mean paper thickness 1.3mm the variance of 2. Answer the following questions.
1.3. Find the estimated standard error of the proportion if, in the sample of machines, 36 machines had
produced paper that is thicker than the average. Is this a good estimate?
1.4. Find the estimated variance of the sample mean and its appropriate standard error. Explain your
answer.
Transcribed Image Text:1.3. Find the estimated standard error of the proportion if, in the sample of machines, 36 machines had produced paper that is thicker than the average. Is this a good estimate? 1.4. Find the estimated variance of the sample mean and its appropriate standard error. Explain your answer.
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