Statistics help
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1. Using StatCrunch, calculate the chisquare statistic and degrees of freedom for the following set of data for 300 people:
Group AGroup BGroup CTotal
Had flu shot 20 30 32 82
Didnâ€™t have flu shot 80 70 68 218
Total 100 100 100 300
Is the value of the chisquare 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 chisquare 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 XTotal
Had > 8 wk rehab 18 32 50
Had < 8 wk rehab 70 60 130
Total 88 92 180
Is the value of the chisquare 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 chisquare are statistically significant:

Ï‡^{2} = 3.02, df = 1, Î± = 0.05

Ï‡^{2} = 8.09, df = 4, Î± = 0.05

Ï‡^{2} = 10.67, df = 3, Î± = 0.01

Ï‡^{2} = 9.88, df = 2, Î± = 0.01
6. Match each of the nonparametric tests in Column A with its parametric counterpart in Column B
A. Nonparametric Test B. Parametric Test
1. MannWhitney Utest a. Paired ttest
2. Friedman test b. Oneway ANOVA
3. KruskallWallis test c. Independent groups ttest
4. Wilcoxon signedranks test d. Repeated measures ANOVA
7. 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 (110 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 9
21 21 65 65 91 91
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