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If the average turnover obtained per day at the supermarket reaches Rp. 2,500,000, based on experience the large standard deviation of income is Rp. 500,000 but, the supermarket manager guessed that the average income had changed. So the manager conducts research for 40 consecutive days and the results obtained from the average daily income of supermarkets are Rp. 2,800,000. By taking the level of significance a = 5%, is the management's guess correct?

If the average turnover obtained per day at the supermarket reaches Rp. 2,500,000, based on experience the large standard deviation of income is Rp. 500,000 but, the supermarket manager guessed that the average income had changed. So the manager conducts research for 40 consecutive days and the results obtained from the average daily income of supermarkets are Rp. 2,800,000. By taking the level of significance a = 5%, is the management's guess correct?

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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I have a question in my home work related Statistics lesson. The following below is my question.
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If the average turnover obtained per day at the supermarket reaches Rp. 2,500,000, based on experience the large standard deviation of income is Rp. 500,000 but, the supermarket manager guessed that the average income had changed. So the manager conducts research for 40 consecutive days and the results obtained from the average daily income of supermarkets are Rp. 2,800,000. By taking the level of significance a = 5%, is the management's guess correct?
Transcribed Image Text:If the average turnover obtained per day at the supermarket reaches Rp. 2,500,000, based on experience the large standard deviation of income is Rp. 500,000 but, the supermarket manager guessed that the average income had changed. So the manager conducts research for 40 consecutive days and the results obtained from the average daily income of supermarkets are Rp. 2,800,000. By taking the level of significance a = 5%, is the management's guess correct?
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