PrintTech Inc. is introducing a new line of ink-jet printers and would like to promote the number of pages a user can expect from a print cartridge. A sample of 10 cartridges revealed the following number of pages printed. (UsetDistribution Table&zDistribution Table.)

3,447 2,734 2,491 2,556 2,574 3,297 2,531 2,654 4,009 2,952

Required:

a.What is the point estimate of the population mean?(Round your answer to 1 decimal place.)

b.What is the point estimate of the population standard deviation?(Round your answer to 3 decimal places.)

c.What is the margin of error for a 99% confidence interval estimate?(Round your answer to 3 decimal places.)

d.Develop a 99% confidence interval for the population mean.(Round "t value" to 3 decimal places and round your answers to 2 decimal places.)