MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER You may need to use the appropriate appendix table or technology to answer this question. In developing patient appointment schedules, a medical center wants to estimate the mean time that a staff member spends with each patient. Use a planning value for the population standard deviation of seven minutes (Round your answers up to the nearest integer) How large a sample should be taken if the desired margin of error a two minutes at a 95% level of confidence? 22 How large a sample should be taken for a 99% level of confidence? 2.576 x Need Help? Sand Answer 4. DETAILS PREVIOUS ANSWERS ASWSBE15 8.E.061.MI You may need to use the appropriate appendix table or technology to answer this question MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER In 2014, the Centers for Disease Control and Prevention (CDC) reported the percentage of people 18 years of age and older who smoke. Suppose that a study designed to collect new data on smokers and nonsmokers use a pr estimate of the proportion who smoke of 0.30 (a) How large a sample should be taken to estimate the proportion of smokers in the population with a margin of error of 0.027 Use 95% confidence. (Round your answer up to the 2017 (b) Assume that the study uses your sample size recommendation in part (a) and finds 20 smokers. What is the point estimate of the proportion of smokers in the population? (Round your answer to four decimal places.) 02280 (c) what is the 95% confidence interval for the proportion of smokers in the population? (Round your answers to four decimal places.) 02033 Xto 00176