References Exercise 9-19 (Algo) (LO9-4) A population's standard deviation is 14. We want to estimate the population mean with a margin of error of 2, with a 98% level of condence. How large a sample is required? (Round your intermediate calculations to 2 decimal places and round your answer up to the next whole number.) L69 oints Exercise 9-42 (Algo) (LO9-3) Pharmaceutical companies promote their prescription drugs using television advertising. In a survey of 110 randomly sampled television viewers, 11 indicated that they asked their physician about using a prescription drug they saw advertised on TV. a. What is the point estimate of the population proportion? (Round your answers to 1 decimal places.) 9 Answer is complete but not entirely correct. b. What is the margin of error for a 95% confidence interval estimate? (Round your answers to 2 decimal places.) 0 Answer is complete and correct. 0.06 o c. Compute the 95% confidence interval for the population proportion. (Round your answers to 3 decimal places.) 6 Answer is complete but not entirely correct. d. Is it reasonable to conclude that 20% of the viewers discuss an advertised drug with their physician? Yes No 4 Exercise 9-12 (Algo) (L09-2) The US. Dairy Industry wants to estimate the mean yearly milk consumption. A sample of 19 people reveals the mean yearly 7.69 consumption to be 70 gallons with a standard deviation of14 gallons. Assume the population distribution is normal. (Use tDistribution points Ta ble.) 8-1. What is the value of the population mean? Unknown 0 70 14 a-2. What is the best estimate of this value? 0 Answer is complete and correct. b. For a 98% confidence interval, what is the value oft? (Round your answer to 3 decimal places.) 0 Answer is complete and correct. 2.552 a c. What is the margin of error? (Round your answer to 3 decimal places.) l :1. Develop the 98% confidence interval for the population mean. (Round your answers to 3 decimal places.) 0 Answer is complete and correct. 61.603 78.197 9 2. Would it be reasonable to conclude that the population mean is 58 gallons? No 0 Yes It is not possible to tell