14th Edition

ISBN: 9780134685168

Author: STEPHAN

Publisher: YUZU

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Chapter 10, Problem 8PS

A recent study found that 51 children who watched a commercial for Walker Crisps (potato chips) featuring a long-standing sports celebrity endorser ate a mean of 36 grams of Walker Crisps as compared to a mean of 25 grams of Walker Crisps for 41 children who watched a commercial for an alternative food snack.

Suppose that the sample standard deviation for the children who watched the sports celebrity-endorsed Walker Crisps commercial was 21.4 grams and the sample standard deviation for the children who watched the alternative food snack commercial was 12.8 grams.

a. Assuming that the population variances are equal and α = 0.05 , is there evidence that the mean amount of Walker Crisps eaten was significantly higher for the children who watched the sports celebrity-endorsed Walker Crisps Commercial?

b. Assuming that the population variances are equal, construct a 95 % confidence interval estimate of the difference between the mean amount of Walker Crisps eaten by children who watched the sports celebrity-endorsed Walker Crisps Commercial and children who watched the alternative food snack commercial.

c. Compare and discuss the results of (a) and (b).

d. Based on the results of (a) and (b), if you wanted to increase the consumption Walker Crisps, which commercial would you choose?

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Chapter 10, Problem 7PS

Chapter 10, Problem 9PS

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Chapter 10 Solutions

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Solution Summary: The author determines whether the mean amount of Walker Crisps eaten was significantly higher for the children who watched the sport celebrity-endorsed Walker –Crisps commercial at the 0.01 significance level.

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