Question

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

1000

and

1400

chocolate​ chips, inclusive?

​(b) What is the probability that a randomly selected bag contains fewer than

1000

chocolate​ chips?

​(c) What proportion of bags contains more than

1200

chocolate​ chips?

​(d) What is the percentile rank of a bag that contains

1475

chocolate​ chips?

Answer 1

Solution-

Given data,

Mean = 1252

Standard deviations = 129

Chocolate chips are approximately normally distributed.