A survey of 35 randomly selected iPhone owners showed that the purchase price has a mean of $650 with a sample standard deviation of $35. a. What is the point estimate of the population mean? Population mean b. What is the point estimate of the population standard deviation? Standard deviation c. What is the standard error of the sample mean? Standard error 5 c. What is the standard error of the sample mean? Standarder $ d. Compute the 95% confidence interval to estimate the population mean (Use Distribution Table) (Round your answers to 3 decimal places.) The confidence interval is between and How many users need to be sampled to estimate the population mean price with 95% confidence and a $9 margin of error? (Use 2 Distribution Table (Round up your answer to the next whole number.) Sung 50