Sample size problems: Just state the minimum sample size Confidence intervals: state your result is a sentence, like "we are 95% confident that ? Is between blank and blank " Hypothesis tests: perform the appropriate hypothesis test, including all 5 steps. 1. Ho & H1 2. a= 3. Test 4. Test statistic and p-value 5. Decision about H0/ conclusion about H1 If the necessary conditions are not let, use the appropriate alternative test. 1. One Proportion- Binomial 2. Two proportion- randomization test for two proportions 3. One mean - sign test 4. Paired difference- Wilcoxon Signed Ranks 5. Two mean test- Mann Whitney 6. Anova- Kruskal Wallis 10) A group of 9 concertgoers was selected at random. Before the concert they were given a hearing test, and then given another one after the concert. (The volume varies during the test, and the subject also had to state which ear the sound was in.) here are the number of correctly identified sounds out of 10, both before and after the concert. PERSON Before After A 9 8 B 10 8 C 9 9 D 8 6 E 8 6 F 9 7 G 9 10 H 9 8 I 8 5 At the 0.05 level of significance, test a persons hearing is worse after being affected by the noise of a concert