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 a standard deviation of

118

chips, according to a study by cadets of the U.S. Air Force Academy.(a) Determine the

26th

percentile for the number of chocolate chips in an 18-ounce bag of Chips Ahoy! cookies.(b) Determine the number of chocolate chips in a bag of Chips Ahoy! that make up the middle

96%

of bags.(c) What is the interquartile range of the number of chips in Chips Ahoy! cookies?