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5. Mr. C studies the strength of the material used for a baseball bat, he knows that the strength is approximately normally distributed with a standard deviation of 175 psi. A random sample 30 specimens has a mean strength of 2,750 psi. a) What is the z-value when the mean strength is tested to be 3,000 psi, b) What will be the decision for the hypothesis testing with a=0.05 c) What is the minimum mean tensile strength needed from 30 samples, for the claim of 3,000 psi to be failed to rejected.

5. Mr. C studies the strength of the material used for a baseball bat, he knows that the strength is approximately normally distributed with a standard deviation of 175 psi. A random sample 30 specimens has a mean strength of 2,750 psi. a) What is the z-value when the mean strength is tested to be 3,000 psi, b) What will be the decision for the hypothesis testing with a=0.05 c) What is the minimum mean tensile strength needed from 30 samples, for the claim of 3,000 psi to be failed to rejected.

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
Problem 1P
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5. Mr. C studies the strength of the material used for a baseball bat, he knows that the strength is approximately normally distributed with a standard deviation of 175 psi. A random sample 30 specimens has a mean strength of 2,750 psi. a) What is the z-value when the mean strength is tested to be 3,000 psi, b) What will be the decision for the hypothesis testing with a=0.05 c) What is the minimum mean tensile strength needed from 30 samples, for the claim of 3,000 psi to be failed to rejected.
Transcribed Image Text:5. Mr. C studies the strength of the material used for a baseball bat, he knows that the strength is approximately normally distributed with a standard deviation of 175 psi. A random sample 30 specimens has a mean strength of 2,750 psi. a) What is the z-value when the mean strength is tested to be 3,000 psi, b) What will be the decision for the hypothesis testing with a=0.05 c) What is the minimum mean tensile strength needed from 30 samples, for the claim of 3,000 psi to be failed to rejected.
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