Manufacturing and Product Development
Tefloncoated pots and pans are designed to be nonstick and to make cooking and clean-up easier. A recent study compared the thickness of the Teflon layer in new, factory-coated pans with recoated pans.
a. Find a 95% confidence interval for the population mean Teflon thickness in factory-coated pans.
b. Find a 95% confidence interval for the population mean Teflon thickness in recoated pans.
c. Is there any evidence to suggest these two population means are different? Justify your answer.