Unformatted text preview: 5 2.4 3.9 5 2.5 3.9 5 3.3 4.1 5 3.3 4.8 5 K 1 = 0 K 2 = 25 (b) Check that K 1 + K 2 = n 1 × n 2 . Answer: 0 + 25 = 5 × 5 . (c) Compute the test statistic U s . Answer: U s = 25 , the larger of K 1 or K 2 . (d) Compute the p–value for the test, perhaps by bounding using Table 6 (pp. 680–684). Use a twosided alternative. Answer: According to Table 6, the pvalue is 0.01. It’s ﬁne to say p < . 01 too here. (e) Do you accept or reject that the distributions are the same at the 5% signiﬁcance level? Why? Answer: We reject that the populations of group housed and singly housed mice have the same distribution of benzo(a)pyrene in their stomachs at the 5% level because p < . 01 < . 05 ....
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This note was uploaded on 12/14/2011 for the course STAT 205 taught by Professor Hendrix during the Fall '09 term at South Carolina.
 Fall '09
 Hendrix

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