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 3) Does a parents education level have anything to do with their involvement at their child's school? A random sample of 601 parents of elementary school children were asked about their own education level and whether they volunteered at their child's school. Here are the results. EDUCATION LEVEL: Less than high school High school graduate Some postsecondary College graduate Graduate/professional VOLUNTEERED AT SCHOOL 27 56 45 61 25 DID NOT VOLUNTEER AT SCHOOL 122 124 67 55 19 At the 0.01 level of significance, test the claim that education attainment and volunteering at school are independent