Past experience has indicated that the breaking strength of yarn used in manufacturing drapery material is normally distributed and that a = 3 psi. A random sample of 8 specimens is tested, and the average breaking strength is found to be 93 psi. Find a 95% two-sided confidence interval on the true mean breaking strength. Round the answers to 1 decimal place. SHS i i Statistical Tables and Charts
Past experience has indicated that the breaking strength of yarn used in manufacturing drapery material is normally distributed and that a = 3 psi. A random sample of 8 specimens is tested, and the average breaking strength is found to be 93 psi. Find a 95% two-sided confidence interval on the true mean breaking strength. Round the answers to 1 decimal place. SHS i i Statistical Tables and Charts
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Transcribed Image Text:Past experience has indicated that the breaking strength of yarn used in manufacturing drapery material is normally distributed and
that a = 3 psi. A random sample of 8 specimens is tested, and the average breaking strength is found to be 93 psi. Find a 95% two-sided
confidence interval on the true mean breaking strength. Round the answers to 1 decimal place.
Sus
Statistical Tables and Charts
Expert Solution
Step 1
Using Statistical table ,
Using z table (area to the left ) , To see the z-score (Z-critical value) at probability 0.05 we get z=-1.96 and at probability 0.975 we get Z=1.96
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