The annual report of dennis industries cited these primary earnings per common share for the past 5 years: $2.26, $1.29, $2.19, $4.22, and $3.32. if we assume these are population values. what is the arithmetic mean primary earnings per share of common stock? (round your answer to 2 decimal places.) what is the variance? (do not round intermediate calculations. round your answer to 2 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?