QUESTION 10

Time Magazine quoted a poll performed in 2008 of 100 Americans in which 10 said that they were vegetarian. Construct a 95% confidence interval for the true population proportion of vegetarians. The upper bound of the confidence interval (enter as a percentage without the % sign eg. 5.13) is:

QUESTION 11

A Swedish study of 1400 patients who had suffered cardiovascular events randomly placed the patients into two groups for follow up. 700 patients were placed on a daily aspirin regimen and 700 were given a placebo. Of the patients taking aspirin 50 suffered another event within 5 years, while in the placebo group 70 did. Perform the appropriate statistical test for the null hypothesis the proportion of patients taking aspirin suffering another event = the proportion of patients taking a placebo suffering another event and the alternative hypothesis that there was a difference in the proportions. What is the proportion of subsequent events for the aspirin group? (enter as a decimal proportion eg .093)

QUESTION 12

What is the proportion of subsequent events for the placebo group? (enter as a decimal proportion eg .093)

13 Using your table for the Standard normal distribution what is the value of z for this analysis? (note pcap without subscript is the overall proportion of events.