A study was done on body temperatures of men and women. The results are shown in the table. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Men Women ? ?1 ?2 n 11 59 x? 97.61°F 97.41°F s 0.85°F 0.63°F a. Use a 0.05 significance level to test the claim that men have a higher mean body temperature than women. What are the null and alternative hypotheses? A. H0: ?1 = ?2 H1: ?1 ? ?2 B. H0: ?1 = ?2 H1: ?1 > ?2 C. H0: ?1 ? ?2 H1: ?1 < ?2 D. H0: ?1 ? ?2 H1: ?1 < ?2 The test statistic, t, is [ ]. (Round to two decimal places as needed.)
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The alternative hypothesis (Ha) states that the mean body temperature of men is not equal to the mean body temperature of women. Therefore, the correct option is: Ho: μ1 = μ2 Ha: μ1 ≠ μ2 Show more…
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