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# Olestra is a fat substitute approved by the FDA for use insnack foods. Because there

ISBN: 9781305251809 122

## Solution for problem 53 Chapter 9.4

Probability and Statistics for Engineering and the Sciences | 9th Edition

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Probability and Statistics for Engineering and the Sciences | 9th Edition

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Problem 53

Olestra is a fat substitute approved by the FDA for use insnack foods. Because there have been anecdotal reports ofgastrointestinal problems associated with olestra consumption,a randomized, double-blind, placebo-controlled experiment was carried out to compare olestra potatochips to regular potato chips with respect to GI symptoms(Gastrointestinal Symptoms Following Consumptionof Olestra or Regular Triglyceride Potato Chips, J. ofthe Amer. Med. Assoc., 1998: 150152). Among 529individuals in the TG control group, 17.6% experiencedan adverse GI event, whereas among the 563 individualsin the olestra treatment group, 15.8% experienced suchan event.a. Carry out a test of hypotheses at the 5% significancelevel to decide whether the incidence rate of GI problemsfor those who consume olestra chips accordingto the experimental regimen differs from the incidencerate for the TG control treatment.b. If the true percentages for the two treatments were15% and 20%, respectively, what sample sizes(m 5 n) would be necessary to detect such a differencewith probability .90?

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● Chapter 2 ­ Descriptive Statistics ○ Displaying out data ■ Graphic Displays for numeric data. ■ Dot Plot ● Start with a number line, put a dot for each observation ● Best for smaller data sets ■ Family with...

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