The diameter of holes for a cable harness is known to have a normal distribution with a standard deviation of 0.01 inch. A random sample of size 10 yields an average diameter of 1.5045 inch.Find a 99% two-sided confidence interval on the mean hole diameter. Find a 90% two-sided confidence interval on the mean hole diameter.Explain the difference of the interval between the two confidence levels.

Given : Sample size = n = 10 Mean = X = 1.5045 Standard deviation = s = 0.01

Answered: The diameter of holes for a cable…

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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The diameter of holes for a cable harness is known to have a normal distribution with a standard deviation of 0.01 inch. A random sample of size 10 yields an average diameter of 1.5045 inch.
1. Find a 99% two-sided confidence interval on the mean hole diameter.

Find a 90% two-sided confidence interval on the mean hole diameter.
Explain the difference of the interval between the two confidence levels.

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