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The sales of a supermarket had an average of $14,000 per day. The store introduced several promotion campaigns in order to increase sales. To determine whether or not the promotion campaigns have been effective in increasing şales, a sample of 144 days of sales was selected. It was found that the average was $16,000 per day. From past information, it is known that the standard deviation of the population is $9,600. The null hypothesis is to be tested at 95% confidence. a) Formulate the null and alternative hypotheses.

The sales of a supermarket had an average of $14,000 per day. The store introduced several promotion campaigns in order to increase sales. To determine whether or not the promotion campaigns have been effective in increasing şales, a sample of 144 days of sales was selected. It was found that the average was $16,000 per day. From past information, it is known that the standard deviation of the population is $9,600. The null hypothesis is to be tested at 95% confidence. a) Formulate the null and alternative hypotheses.

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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c) what is the critical value?

The sales of a supermarket had an average of $14,000 per day. The store introduced several promotion campaigns in order to increase sales. To determine whether or not the promotion campaigns have been effective in increasing şales, a sample of 144 days of sales was selected. It was found that the average was $16,000 per day. From past information, it is known that the standard deviation of the population is $9,600. The null hypothesis is to be tested at 95% confidence. a) Formulate the null and alternative hypotheses.
Transcribed Image Text:The sales of a supermarket had an average of $14,000 per day. The store introduced several promotion campaigns in order to increase sales. To determine whether or not the promotion campaigns have been effective in increasing şales, a sample of 144 days of sales was selected. It was found that the average was $16,000 per day. From past information, it is known that the standard deviation of the population is $9,600. The null hypothesis is to be tested at 95% confidence. a) Formulate the null and alternative hypotheses.
b) What is the z value of the test statistic?
Transcribed Image Text:b) What is the z value of the test statistic?
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