Question
15. For each of the following studies, (a) and (b), decide whether you can reject the null hypothesis that the groups come from identical populations. Use the .01 level. (c) Figure the effect size for each study.
(a) Group 1 Group 2 Group 3
1 1 8
2 2 7
1 1 8
2 2 7
(b) Group 1 Group 2 Group 3
1 4 8
2 5 7
1 4 8
2 5 7
16. What is the Bonferroni corrected significance level for each of the following situations?
Situation (a) (b) (c) (d)
Overall significance level .01 .01 .05 .05
Number of planned contrasts 4 2 4 3
Question
The probability of success for any trial of a binomial experiment is 25%. Find the probability that the proportion of successes in a sample of 500 is less that 22%. Repeat with a sample of 800. Repeat with a sample of 1,000.
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