Answered: Many elementary school students in a…

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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Many elementary school students in a school district currently have ear infections. A random sample of children in two different schools found that 16 of 42 at one school and 18 of 34 at the other have ear infections. At the 0.05 level of significance, is there sufficient evidence to support the claim that a difference exists between the proportions of students who have ear infections at the two schools?

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No, because the test statistic –1.29 is inside the noncritical region –1.96 < z < 1.96.

Yes, because the test statistic –1.29 is outside the noncritical region –1.64 < z < 1.64.

No, because the test statistic 1.29 is inside the noncritical region –1.96 < z < 1.96.

Yes, because the test statistic –6.29 is outside the noncritical region –1.96 < z < 1.96

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