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A radio shop sells, on an average, 200 radios per day with a standard deviation of 50radios. After an extensive advertising campaign, the management will compute theaverage sales for the next 25 days to see whether an improvement has occurred. Assumethat the daily sales of radios are normally distributed.I.Write down the null and alternative hypothesesII.   Test the hypothesis at 5 percent level of significance if xbar = 216.III.   How large must xbar be in order that the null hypothesis is rejected at 5 percentlevel of significance?

A radio shop sells, on an average, 200 radios per day with a standard deviation of 50radios. After an extensive advertising campaign, the management will compute theaverage sales for the next 25 days to see whether an improvement has occurred. Assumethat the daily sales of radios are normally distributed.I.Write down the null and alternative hypothesesII.   Test the hypothesis at 5 percent level of significance if xbar = 216.III.   How large must xbar be in order that the null hypothesis is rejected at 5 percentlevel of significance?

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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A radio shop sells, on an average, 200 radios per day with a standard deviation of 50radios. After an extensive advertising campaign, the management will compute theaverage sales for the next 25 days to see whether an improvement has occurred. Assumethat the daily sales of radios are normally distributed.I.Write down the null and alternative hypothesesII.
 
Test the hypothesis at 5 percent level of significance if xbar = 216.III.
 
How large must xbar be in order that the null hypothesis is rejected at 5 percentlevel of significance?
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