Pooling. In Exercises 25 and 26, assume that the two samples are independent simple random samples selected from
26. Do Men Talk Less Than Women? Repeat Exercise 8 with the additional assumption that σ1 = σ2. How arc the results affected by this additional assumption?
8. Do Men Talk Less Than Women? The accompanying table gives results from a study of the words spoken in a day by men and women, and the original data are in Data Set 17 in Appendix B (based on “Are Women Really More Talkative Than Men?” by Mehl, et al., Science, Vol. 317, No. 5834). Use a 0.01 significance level to test the claim that the mean number of words spoken in a day by men is less than that for women.
Table for Exercise 8
Men | Women | |
n1 = | 186 | n2 = 210 |
|
15,668.5 |
|
s1 = | 8632.5 | s2 = 7301.2 |
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- Algebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:Cengage