A poll was conducted to investigate opinions about global warming. The responden

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? Identify the null and alternative hypotheses. H_0: The sex of the respondent and the choice for the cause of global warming are independent. H_1: The sex of the respondent and the choice for the cause of global warming are dependent. Compute the test statistic. (Round to three decimal places as needed.)

Explanation / Answer

The statistical software output for this problem is:

Contingency table results:
Rows: var2
Columns: None

Chi-Square test:

Hence,

Test Statistic = 2.318

P - Value = 0.3138

Human Activity Natural Patterns Don't Know Total Male 328 146 38 512 Female 304 167 37 508 Total 632 313 75 1020

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