Project #29021 - Stats HW

Here is the assignment. I also need you to do three webassign homeworks and show your work by putting the steps you used in a word document.

In Exercise 8.28 (page 504 of the text) we examined the percent of fatally injured bicyclists tested for alcohol who tested positive. Here we examine the same data with respect to gender.

 Gender n X (tested positive) Female 191 27 Male 1520 515

(a) For female and male separately, what is the estimated proportion of injured bicyclists who tested positive for alcohol? What are the odds and odds ratio?

(b) Use SPSS to conduct a Fisher's exact test and a Pearson Chi-square test to examine whether the two proportions are equal? State the hypotheses, report the p-value, and conclude.

(c) Conduct the same hypothesis testing using Normal approximation. Verify the conditions for using Normal approximation. Do you see a difference from (b)?

(c) Use SPSS to compute the 95% confidence interval for the odds ratio and interpret it.

(d) Compute the 95% confidence interval for the difference of the two proportions and interpret it.

Due by 4/29.

 Subject Mathematics Due By (Pacific Time) 04/29/2014 09:51 pm
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