Answered: A poll was conducted to investigate…

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 poll was conducted to investigate opinions about global warming. The respondents who answered yes when asked if there is solid evidence that the earth is getting warmer were then asked to select a cause of global warming. The results are given in the accompanying data table. Use a 0.01
significance level to test the claim that the sex of the respondent is independent of the choice for the cause of global warming. Do men and women appear to agree, or is there a substantial difference?


	Human activity	Natural patterns	Don't know
Male	305	151	41
Female	310	170	43

A. Identify the null and alternative hypotheses.

H0:(The sex of the respondent/Respondents who answered yes/The choice for human activity) and (the respondents who answered no/the choice for the cause of global warming/the choice for natural patterns) are (dependent/independent)

H1:(The sex of the respondent/Respondents who answered yes/The choice for human activity) and (the respondents who answered no/the choice for the cause of global warming/the choice for natural patterns) are (dependent/independent)

a2. Compute the test statistic. _____

B. Find the critical value(s).

C. What is the conclusion based on the hypothesis test?

(Reject/Fail to reject) H0. There (is not/is) sufficient evidence to warrant rejection of the claim that the sex of the respondent is independent of the choice for the cause of global warming. Men and women (appear/do not appear) to agree.

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