Answered: Drugs In a full-page ad that ran in…

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

Drugs In a full-page ad that ran in many U.S. newspa-
pers in August 2002, a Canadian discount pharmacy

listed costs of drugs that could be ordered from a Web
site in Canada. The table compares prices (in US$) for
commonly prescribed drugs.a) Give a 95% confidence interval for the average
savings in dollars.
b) Give a 95% confidence interval for the average
savings in percent.
c) Which analysis is more appropriate? Why?
d) In small print the newspaper ad says, “Complete list
of all 1500 drugs available on request.” How does this
comment affect your conclusions above?

Cost per 100 Pills
United States Canada Percent savings

Drug Name
Cardizem 131 83 37
Celebrex 136 72 47
Cipro 374 219 41
Pravachol 370 166 55
Premarin 61 17 72
Prevacid 252 214 15
Prozac 263 112 57
Tamoxifen 349 50 86
Vioxx 243 134 45
Zantac 166 42 75
Zocor 365 200 45
Zoloft 216 105 51

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