Problem 2: The manufacturer of a new line of inkojet printers would like to include as part of its advertising the number of pages a user can expect from a print cartidge. A sample of 10 cartidges revealed the following number of pages printed. Hint: The sample standard deviation (s)=304.4 a) What is the point estimate of the population mean? b) Develop a 95\% confidence interval for the population mean? Problem 3: Dylan Jones kept careful records of the fuel efficiency of his new car. After the first nine times he filled up his tank, he found the mean was 23.4 miles per gallon (mpg) with a sample standard deviation of 9 mpg. Using a 95% confidence interval, how many times (sample size) should he fill his gal tank to obtain a margin of error below 0.1mpg ? (Hint: be sure to use the Z table.)