41. Three-megapixel digital cameras are typically the lightest, most compact, and easiest to use. However, if you plan to enlarge or crop images, you will probably want to spend more for a higher-resolution model. The following shows sample prices of five-megapixel and three-megapixel digital cameras (Consumer Reports Buying Guide, 2004).

a. Provide a point estimate of the difference between population mean prices for the two types of digital cameras. What observation can you make about the price of the higherquality five-megapixel model?

b. Develop a 95% confidence interval estimate of the difference between the two population mean prices.