Answered: calculate the SD. SD of box =…

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

The customer support team for a large internet retailer selects customers at random from among all those who have used customer support in the last month to survey regarding their satisfaction the interaction they had. Suppose they randomly select 120 customers out of the approximately 5,000 who have received support, and of these, 84 say they were satisfied.    (a) Skim through the rest of the problem, then circle the correct answers below.   The box we need for this problem has... 0’s and 1’s OR other values   The SD of the population in this problem is... known OR estimated    (b) Make your box and calculate the SD. SD of box = ___________       (c) The percentage of all customers using customer support in the last month who were satisfied is estimated to be about ________%, and this estimate is likely to be off by about ________% or so.          (d) A 95% confidence interval for the percentage of all customers using customer support in the last month who were satisfied goes from ________% to ________%. 

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