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Name: A local radio station found that of 600 people surveyed 72 listened re
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Description: A local radio station found that of 600 people surveyed 72 listened regularly to the station. A four month advertising campaign was undertaken to publicize the station. A second survey of 500 people then revealed that 92 people listened regularly to

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 local radio station found that of 600 people surveyed 72 listened regularly to the station. A four month advertising campaign was undertaken to publicize the station. A second survey of 500 people then revealed that 92 people listened regularly to the station.

Test to see if the campaigned increased the percentage of regular listeners.

Show the formula and test at a Type I error of .01 and also find the p value.

Construct a 95% confidence interval for the difference between these after and before percentages (Pafter – Pbefore).

Interpret this confidence interval.

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