The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a
mean of 1252 chips and standard deviation 129 chips.
(a) What is the probability that a randomly selected bag contains between 1100 and 1400 chocolate chips, inclusive?
(b What is the probability that a randomly selected bag
contains fewer than 1050 chocolate chips?
) What proportion of bags contains more than 1200 chocolate chips?
(d) What is the percentile rank of a bag that contains 1425 chocolate chips?