The weights of all packages of a certain brand of cookie are normally distributed withµ = 32 and σ = 0.3 (ounces).
(a) Calculate the probability that one package of cookies weighs between 31.8 and 32 ounces.
(b) Consider a sample of 20 individual packages. Calculate and interpret the standard error.
(c) Calculate the probability that the mean from a sample of 20 packages weighs between 31.8 and 32 ounces.