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 35 36 Male 147 170 Female Click here to view the chi square distribution table H 331 311 Identify the null and alternative hypotheses Ho and Vand Chi square distribution table Degrees of Freedom 1 2 3 4 5 6 7 8 0 995 0 99 0 975 0 001 0 051 Area to the Right of the critical value 0 010 0 020 0 072 0 115 0 216 0 207 0 484 0 297 0 412 0 554 0 831 0 676 0 872 0 989 1 239 1 344 1 646 1 237 1 690 2 180 Vare 0 95 0 90 0 004 0 016 0 103 0 211 0 352 0 584 0 711 1 145 1 635 2 167 2 733 are 1 064 1 610 2 204 2 833 3 490 0 10 2 706 4 605 6 251 7 779 9 236 10 645 12 592 12 017 14 067 13 362 15 507 0 05 3 841 5 991 7 815 9 488 11 071 0 025 0 01 5 024 6 635 7 378 9 210 9 348 11 345 11 143 13 277 12 833 15 086 14 449 16 812 16 013 17 535 18 475 20 090 X 0 005 7 879 10 597 12 838 14 860 16 750 18 548 20 278 21 955