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3. (1) In a cross sectional study of bicycle helmet use, authors were interested in assessing neighborhood socio-economic status (as measured by percentage of school children receiving free or reduced-fee lunches at school) and percentage of bicycle rider wearing a helmet. If the assumptions of the test were met, what is the appropriate statistical test to perform:a. two independent sample t-testb. Wilcoxon sign-rank testc. correlation analysisd. chi-square one-sample test of the variancee. none of the above4. (1) To evaluate the efficacy of two different smoking cessation programs, smokers are randomized to receive either Program A or Program B. Of the six smokers in Program A, one stopped smoking; of the six smokers in Program B, four stopped smoking. Which statistical procedure would you use to test the null hypotheses that the programs are equally effective and to obtain a p-value?