Answered: Supermercados VIVA's marketing manager…

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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Question

Supermercados VIVA's marketing manager wants to estimate the proportion of customers who would not recommend the brand. What should be the minimum sample size that you will need to perform this estimate, if you want results with a confidence level of 96.6% and a margin of error of 4.4%?

1. The formula to be used corresponds to the sample size to estimate a:
2.The table value associated with the confidence level is:
3.The number of clients selected to be part of the sample is:

Expert Solution

Step 1

Given that margin of error E = 4.4% = 0.044

Confidence level is 96.6% that is level of significance α = 3.4% = 0.034

Let P is the proportion of customers who would not recommend the brand

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