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4. The strength of paper used by a certain company is approximately normally distributed with mean 30 p.s.i. and standard deviation 3 p.s.i. The company decides to test a new source of paper made by a different manufacturer. If this paper is significantly stronger, then the company will switch its trade to this new manufacturer. A batch of paper is

4. The strength of paper used by a certain company is approximately normally distributed with mean 30 p.s.i. and standard deviation 3 p.s.i. The company decides to test a new source of paper made by a different manufacturer. If this paper is significantly stronger, then the company will switch its trade to this new manufacturer. A batch of paper is

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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obtained from this manufacturer and a series of measurements are to be made on the strength of different pieces of paper from the batch. Assuming that the standard deviation of these measurements is also per cent certain of detecting a mean increase in strength of 2 p.s.i. with a one- 3 p.s.i., how large a sample size should be chosen so as to be 95 tailed test at the 5 per cent level?
Transcribed Image Text:obtained from this manufacturer and a series of measurements are to be made on the strength of different pieces of paper from the batch. Assuming that the standard deviation of these measurements is also per cent certain of detecting a mean increase in strength of 2 p.s.i. with a one- 3 p.s.i., how large a sample size should be chosen so as to be 95 tailed test at the 5 per cent level?
4. The strength of paper used by a certain company is approximately normally distributed with mean 30 p.s.i. and standard deviation 3 p.s.i. The company decides to test a new source of paper made by a different manufacturer. If this paper is significantly stronger, then the company will switch its trade to this new manufacturer. A batch of paper is
Transcribed Image Text:4. The strength of paper used by a certain company is approximately normally distributed with mean 30 p.s.i. and standard deviation 3 p.s.i. The company decides to test a new source of paper made by a different manufacturer. If this paper is significantly stronger, then the company will switch its trade to this new manufacturer. A batch of paper is
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