Use a calculator to verify that Σx = 131, Σx2 = 6783, Σy = 153, Σy2 = 4895, and Σxy = 3233. Compute r. (Round your answer to three decimal places.)

The number of chocolate chips in a bag of chocolate chip cookies is approximately normally distributed with a mean of 12611261 chips and a standard deviation of 118118 chips. (a) determine the 2626th percentile for the number of chocolate chips in a bag. (b) determine the number of chocolate chips in a bag that make up the middle 9696% of bags. (c) what is the interquartile range of the number of chocolate chips in a bag of chocolate chip cookies?