A soap manufacturer wanted to know that percentage of the citizens of Sri Lanka use his product. He conduct a sample survey and found that out of 400 persons selected at random only 60 persons use this soap. He spends one hundred thousand rupees on an advertising campaign to attract more customers. In order to know the result of his campaign, he conducted another survey of 500 persons selected at random and found that 125 persons of them use his product after the campaign. Do you thing that the advertisement campaign has really increased the percentage of the citizen of Sri Lankan using his product? Justify your answer using 95% confidence interval.

A soap manufacturer wanted to know that percentage of the citizens of Sri Lanka use his product. He conduct a sample survey and found that out of 400 persons selected at random only 60 persons use this soap. He spends one hundred thousand rupees on an advertising campaign to attract more customers. In order to know the result of his campaign, he conducted another survey of 500 persons selected at random and found that 125 persons of them use his product after the campaign. Do you thing that the advertisement campaign has really increased the percentage of the citizen of Sri Lankan using his product? Justify your answer using 95% confidence interval.

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Description: A soap manufacturer wanted to know that percentage of the citizens of Sri Lanka usehis product. He conduct a sample survey and found that out of 400 persons selectedat random only 60 persons use this soap. He spends one hundred thousand rupees onan

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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