Answered: A company providing mobile phone…

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

A company providing mobile phone service plans has a list of phone numbers for
their 125,000 customers. The company is considering adding a new service that
includes unlimited video streaming, as an add-on to existing data plans. A simple
random sample of 256 customers is polled by the store and asked what they would
be willing to pay per month to add the new service. The sample average of the
responses is $10, and the sample standard deviation is $8. The histogram of the
sample data is heavily skewed to the right.

(a) Find the 99%-confidence interval for the average of what they’d be willing to
pay.

($________, $________)

(b) A company executive suggests that the monthly price of the new service should
be set at the lower end of the confidence interval above, since only 1% of
customers would NOT be willing to pay this much. Do you agree with this
reasoning?

(circle one) YES or NO, and briefly explain your answer:

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