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Name: A cellular phone company is interested in estimating the difference be
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Description: A cellular phone company is interested in estimating the difference between the mean ages of females and males who have contracts for cellular phones with their company. Results from independent random samples of customers are shown below along with

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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A cellular phone company is interested in estimating the difference between the mean ages of females and males who have contracts for cellular phones with their company. Results from independent random samples of customers are shown below along with the population standard deviation of ages for each gender.

	male	female
sample size	130	125
sample mean	35	29
population standard deviation	7	5

What is the 95% confidence interval estimate for the difference between the mean ages of the male and female customers?

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