Chapter 17, Problem 52E

Exercises 49 through 52 refer to the following: Packaged foods sold at supermarkets are not always the weight indicated on the package. Variability always crops up in the manufacturing and packaging process. Suppose that the exact weight of a “12-ounce” bag of potato chips is a random variable that has an approximately normal distribution with mean $\mu =12$ ounces and standard deviation $\sigma =0.5$ ounce.

Suppose that 1500 “1 2-ounce” bags of potato chips are chosen at random. Estimate the number of bags of potato chips with weight.

a. between 11 and 11.5 ounces.

b. between 11.5 and 12 ounces.

c. between 12 and 12.5 ounces.

d. between 12.5 and 13 ounces.

e. between 13 and 13.5 ounces.