A production process fills boxes with 20 ounces of product with a standard deviation of 2 ounces, and the amount of product in each box tends to follow a normal distribution.

(a) An inspector samples a random box and finds it contains 22 ounces of the product. Is this unusually high?

(b) Another inspector takes a random sample of 100 boxes and finds an average of 22 ounces per box. Is this unusually high?