The next two questions refer to the following situation. In order to compare two

Question

The next two questions refer to the following situation. In order to compare two kinds of eed thirteen pigs are split into two groups, and each group received one feed. The following are the in weight (kilograms) after a fixed period of time: Feed A: 8.0 745862 8895 Feed B: 12.0 18.2 809.6 8.299 10.3 We wish to test the hypothesis that Feed B gives rise to larger weight gains 34. The appropriate test statistic and p-value are T,.-2.4048; p-value-.0431 T -24048: p-value ,0216 (c) T..-22596; p-value-.0451 (d) T..-22596; p-value-.0256 el (e) r-6.85; p-value . 05.20 88626 3204 v. written up in a report, but a reviewer of the report thought that some of the eecessary for a two-sample t-test might be violated. Consequently,a non-parametric e wa also done. The rank-sum test statistic computed for Feed A and the correspondingp done. The rank-sum test statistic computed for Feed A and the corresponding p- ralue are () W 25.5 p-value 009 .018 (b) w . 25.5 p-value c)w-23.5p-value 003 (d) w 23.5 p-values .006 7.45 p-value (e) W .043 36. Which of Variance technique? (a) The samples are independent and randomly selected. (b) The populations are normally distributed (c) The variances of the populations are the same. d) The means of the populations are equal. e) all of the above the following is not a necessary assumption underlying the use of the Analysis of 37. Which of the following is NOT CORRECT about a randomized complete block experiment? (a) Every block is randomized separately from every other block (b) Every treatment must appear at least once in every block (c) Blocking is used to remove the effects of another factor (not of interest) from the comparison of levels of the primary factor (d) The ANOVA table will have another line in it for the contribution to the variability from blocks (e) Blocks should contain experimental units that are as different as possible from each other

Explanation / Answer

Q25.

N Median
FEED A 6 7.700
FEED B 7 9.900

Point estimate for 1 - 2 is -2.350
96.2 Percent CI for 1 - 2 is (-6.199,-0.200)
W = 25.5
Test of 1 = 2 vs 1 2 is significant at 0.0223
The test is significant at 0.0221 (adjusted for ties)

[ANSWER] W = 25.5, P = 0.018

No. Label Data Rank 1 FEED A 8 4.5 2 FEED A 7.4 3 3 FEED A 5.8 1 4 FEED A 6.2 2 5 FEED A 8.8 7 6 FEED A 9.5 8 7 FEED B 12 12 8 FEED B 18.2 13 9 FEED B 8 4.5 10 FEED B 9.6 9 11 FEED B 8.2 6 12 FEED B 9.9 10 13 FEED B 10.3 11

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