● Question 6You measure 45 textbooks' weights, and find they have a mean weight of 31 ounces. Assume thepopulation standard deviation is 7.7 ounces. Based on this, construct a 99% confidence interval forthe true population mean textbook weight .Give your answers as decimals, to two places

Name: ● Question 6You measure 45 textbooks' weights, and find they have a m
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Description: ● Question 6You measure 45 textbooks' weights, and find they have a mean weight of 31 ounces. Assume thepopulation standard deviation is 7.7 ounces. Based on this, construct a 99% confidence interval forthe true population mean textbook weight .Give

Answered: You measure 45 textbooks' weights, and…

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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Step 1

Obtain the 99% confidence interval for the true population mean text book weight.

The 99% confidence interval for the true population mean text book weight is obtained below as follows:

Use EXCEL Procedure for finding the critical value of z.

Follow the instruction to obtain the critical value of z:

Open EXCEL
Go to Formula bar.
In formula bar enter the function as“=NORMINV”
Enter the probability as 0.995
Enter the mean as 0 and the Standard deviation as 1.
Click enter

EXCEL output:

From the EXCEL output, the critical value of z at the 99% confidence level is 2.576.

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