The length of 45 items from a manufacturer was measured and the mean length of this sample was found to be 1.15 m. It is known from previous data sets that the standard deviation of length of this item is 3.0 cm.a) Find the 95% confidence interval for the average measurement\[ \mu \in \left( \underline{\hspace{3cm}}, \underline{\hspace{3cm}} \right) \]b) Using a 5% significance level, is it plausible that the mean of the product length is greater than 1.17 m? (Answer 'Yes/No' in the blank and make sure you justify your answer on your scratch paper)\[ \underline{\hspace{9cm}} \]

The sample size is 45, the sample mean is 1.15 and the population standard deviation si 3.0.

Answered: The length of 45 items from a…

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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