Respond to the following problems. 1. You are running a political campaign and wish to estimate, with 95% confidence, the proportion of registered voters who will vote for your candidate. Your estimate must be accurate within 3% of the true population. Find the minimum sample size needed if A) no preliminary estimate is available and B) a preliminary estimate gives sample proportion of 0.31. Compare your results. 2. You wish to estimate, with 90% confidence and within 2% of the true population, the proportion of male age 20 to 34 who have high blood pressure.Document Preview:Respond to the following problems. 1. You are running a political campaign and wish to estimate, with 95% confidence, the proportion of registered voters who will vote for your candidate. Your estimate must be accurate within 3% of the true population. Find the minimum sample size needed if A) no preliminary estimate is available and B) a preliminary estimate gives sample proportion of 0.31. Compare your results. 2. You wish to estimate, with 90% confidence and within 2% of the true population, the proportion of male age 20 to 34 who have high blood pressure. Find the minimum sample size needed if A) no preliminary is available. B) a previous survey found that 6.4% of males in this age group had high blood pressure. Translate the newspaper excerpt into a confidence interval for p. Approximate the value of the level of confidence, c. 3. In a survey of 8451 U.S. adults, 31.4% said they were taking vitamin E as a supplement. The surveys margin of error is plus or minus 1% . 4. In a survey of 1001 U.S. adults, 27% said they had smoked a cigarette in the past week. The surveys margin of error is plus or minus 3%. 5. A medical research team is investigating the benefits of a new surgical treatment. One of the claims is that the mean recovery time for patients after the new treatment is less than 96 hours. How would you write the null and alternative hypothesis if (A) you are on the research team and want to support the claim? (B) you are on an opposing team and want to reject the claim. Attachments: Case-Study-Qu.pdf
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