The number of chocolate chips in an 18 ounce bag of
The number of chocolate chips in an 18-ounce bag of Chips Ahoy! chocolate chip cookies is approximately normally distributed with a mean of 1262 chips and standard deviation 118 chips according to a study by cadets of the U.S. Air Force Academy.
(a) What is the probability that a randomly selected 18-ounce bag of Chips Ahoy! contains between 1000 and 1400 chocolate chips, inclusive?
(b) What is the probability that a randomly selected 18-ounce bag of Chips Ahoy! contains fewer than 1000 chocolate chips?
(c) What proportion of 18-ounce bags of Chips Ahoy! Contains more than 1200 chocolate chips?
(d) What proportion of 18-ounce bags of Chips Ahoy! Contains fewer than 1125 chocolate chips?
(e) What is the percentile rank of an 18-ounce bag of Chips Ahoy! that contains 1475 chocolate chips?
(f) What is the percentile rank of an 18-ounce bag of Chips Ahoy! that contains 1050 chocolate chips?
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