# Statistics help

1. Using StatCrunch, calculate the chi-square statistic and degrees of freedom for the following set of data for 300 people:Group AGroup BGroup CTotalHad flu shot 20 30 32 82Didnt have flu shot 80 70 68 218Total 100 100 100 300Is the value of the chi-square statistically significant at the 0.05 level?2. Write a paragraph summarizing the results of the analysis in Exercise 1.3. Using StatCrunch, calculate the chi-square statistic and degrees of freedom for the following set of data for 180 people undergoing a knee replacement treatment with a drug supplement:Treatment with drug XTreatment without Drug XTotalHad > 8 wk rehab 18 32 50Had < 8 wk rehab 70 60 130Total 88 92 180Is the value of the chi-square statistically significant at the 0.05 level?4. Write a paragraph summarizing the results of the analysis in Exercise 3.5. Given each of the following circumstances, determine whether the calculated values of chi-square are statistically significant:?2 = 3.02, df = 1, ? = 0.05?2 = 8.09, df = 4, ? = 0.05?2 = 10.67, df = 3, ? = 0.01?2 = 9.88, df = 2, ? = 0.016. Match each of the nonparametric tests in Column A with its parametric counterpart in Column BA. Nonparametric Test B. Parametric Test1. Mann-Whitney U-test a. Paired t-test2. Friedman test b. One-way ANOVA3. Kruskall-Wallis test c. Independent groups t-test4. Wilcoxon signed-ranks test d. Repeated measures ANOVA7. Using the information provided, indicate which statistical test you think should be used for each of the following situations:Independent variable: normal birth weight vs. low birth weight infants; dependent variable: 1 minute Apgar scores (1-10 scale).Independent variable: time of measurement (before, during, and after surgery); dependent variable: heart rate.Independent variable: time of measurement (before, during, and after intervention); dependent variable: did vs did not exercise regularly.Independent variable: infertility treatment A vs infertility treatment B vs control condition; dependent variable: did vs did not become pregnant.8. Below are three sets of expected frequencies for the four cells of 2 X 2 contingency tables. Identify which statistical procedure would be appropriate for each, using the most conservative approach.a. 4 4 b. 35 35 c. 9 921 21 65 65 91 91