1) For this problem, carry atleast four digits after the decimal in your calculations. answers may vary due to rounding. a random sample of medical files is used to estimate the proportion p of all people who have blood type B. A) if you have no preliminary estimate for p, how many medical files should include in a random sample in order to be 85% sure that the point estimate p will be within a distance of 0.03 from p? Find the critical value for 85% confidence level, z0.85, and find the specified maximal error of estimate, E (round your answer to two decimal places) Z0.85 = ________ E=________ Compute the sample size n for estimating the proportion p of all people who have blood type b under restriction (round your answer to nearest whole number) N=____ medical files B) answer part (a) if you use preliminary estimate that about 8 out of 90 people have blood type B (round your proportion to three decimal places and your sample size up to the nearest whole number) P= _____ 1-p=_______ N= ________ medical files 2) for this problem, caret at least four digits after decimal in your calculations. A random sample of medical files is uses to estimate p of all the people who have blood type B. A) if you have preliminary estimate for p, how many medical files should you include in a random sample in order to be 85% sure that the point estimate p will be within a distance of 0.04 from p? (Round your answer up to the nearest whole number) ______ medical files B) answer part (a) if you use preliminary estimate that about 12 out of 90 people have blood type b. _____ medical files 3) carry atleast four digits after the decimal in your calculations. Answers may vary slightly due to rounding. A random sample of medical to estimate proportion p of all people who have blood type b. A) if you have preliminary estimate for p, how many medical files should include in a random sample in order to be 85% sure that the point estimate p will be within a distance of 0.03 from p? ( round your answer to nearest whole) ______ medical files B) answer part (a) if you use preliminary estimate that about 15 out of 90 people have blood type b. ______ medical files 4) carry At least four digits after the decimal in your calculations. Let p be the proportion of calls to business people reaches first try. A) if you have no preliminary estimate for p, how many business phone calls should you include in a random sample to be 80% sure that the point estimate p will be within a distance of 0.03 from p? (Round your answer to the nearest whole number) _________ phone calls B)a report single call approximately 20% of the time. Using this national estimate for p, answer part (a). Round your answer up to the nearest whole number ) _______phone calls 5) carry At least four digits after decimal in your calculations. What percentage of your campus is female? Let p the proportion of women students on your campus. A) if no preliminary study is made to estimate p, how large a sample is needed to be 99% sure that a point estimate p will be within a distance of 0.06 from p? (Round your answer up to the nearest whole number) ______ students B) a report indicates that approximately 54 % of college students are females. Answer part (a) using the estimate for p (round your answer to nearest whole number) _____ students