1 A sample of 34 observations is taken from a normal population with a standard deviation of 18. The sample mean is 40. Determine the 80% confidence interval for the population mean.(Round the final answers to 3 decimal places.)

The Fox TV network is considering replacing one of its primetime crime investigation shows with a new familyoriented comedy show. Before a final decision is made, network executives commission a sample of 560 viewers. After viewing the comedy, 450 indicated they would watch the new show and suggested it replace the crime investigation show, 3. Estimate the value of the population proportion. (Round the final answer to 3 decimal places.) Estimate of proportion b. Compute the standard error of the proportion. (Round the final answer to 3 decimal places.) Standard error of the proportion c. Develop a 98% condence interval for the population proportion. (Round the final answers to 3 decimal places.) The confidence interval is between and d. Interpret your findings. (Round the final answers to the nearest whole number.) We are reasonably sure the population proportion is between and %. Bob Nale is the owner of Nale's Texaco GasTown. Bob would like to estimate the mean number of litres (L) of gasoline sold to his customers, Assume the number of litres sold follows the normal distribution with a standard deviation of 6 L. From his records, he selects a random sample ole sales and finds the mean number of litres sold is 38. a. What is the point estimate of the population mea '1? (Round the final answer to the nearest whole number.) The point estimate ofthe population mean is litres. b. Develop a 95% confidence interval for the population mean. (Round the final answers to 3 decimal places.) The 95% condence interval for the population mean is between and c. Interpret the meaning of part (b). If100 such intervals were determined, the population (Click to select) v would be included in about intervals