A recent study found that 61 children who watched a commercial for potato chips featuring a celebrity endorser ate a mean of 36 grams of potato chips as compared to a mean of 27 grams for 51 children who watched a commercial for an alternative food snack. Suppose that the sample standard deviation for the children who watched the celebrity-endorsed commercial was 21.3 grams and the sample standard deviation for the children who watched the alternative food snack commercial was 12.7 grams. Complete parts (a) through (d) below. a. Assuming that the population variances are equal and α=0.05, is there evidence that the mean amount of potato chips eaten was significantly higher for the children who watched the celebrity-endorsed commercial? Let population 1 be the weights of potato chips eaten by children who watched the celebrity-endorsed commercial and let population 2 be the weights of potato chips eaten by children who watched the alternative food snack commercial. What are the correct null and alternative hypotheses? A. H0: μ1−μ2≥0 H1: μ1−μ2<0 B. H0: μ1−μ2≠0 H1: μ1−μ2=0 C. H0: μ1−μ2=0 H1: μ1−μ2≠0 D. H0: μ1−μ2≤0 H1: μ1−μ2>0

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 recent study found that

children who watched a commercial for potato chips featuring a celebrity endorser ate a mean of

grams of potato chips as compared to a mean of

grams for

children who watched a commercial for an alternative food snack. Suppose that the sample standard deviation for the children who watched the celebrity-endorsed commercial was

21.3

grams and the sample standard deviation for the children who watched the alternative food snack commercial was

12.7

grams. Complete parts (a) through (d) below.

a. Assuming that the population variances are equal and

α=0.05,

is there evidence that the mean amount of potato chips eaten was significantly higher for the children who watched the celebrity-endorsed commercial?

Let population 1 be the weights of potato chips eaten by children who watched the celebrity-endorsed commercial and let population 2 be the weights of potato chips eaten by children who watched the alternative food snack commercial. What are the correct null and alternative hypotheses?

H0:

μ1−μ2≥0

H1:

μ1−μ2<0

H0:

μ1−μ2≠0

H1:

μ1−μ2=0

H0:

μ1−μ2=0

H1:

μ1−μ2≠0