Lewis Dawson

03/03/2024 · Junior High School

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 1025 chocolate chips? (c) What proportion of bags contains more than 1225 chocolate chips? (d) What is the percentile rank of a bag that contains 1425 chocolate chips? (a) The probability that a randomly selected bag contains between 1100 and 1400 chocolate chips, inclusive, is 0.7560. (Round to four decimal places as needed.) (b) The probability that a randomly selected bag contains fewer than 1025 chocolate chips is 0.0392 . (Round to four decimal places as needed.) (c) The proportion of bags that contains more than 1225 chocolate chips is 0.5827 . (Round to four decimal places as needed.) (d) The percentile rank of a bag that contains 1425 chocolate chips is 92 . (Round to the nearest integer as needed.)