Understanding Basic Statistics 6th Edition by Charles Henry Brase,Corrinne Pellillo Brase

Exercise 86

Grouped Data: Business Administration What are the big corporations doing with their wealth One way to answer this question is to examine profits as percentage of assets. A random sample of 50 Fortune 500 companies gave the following information (Source: Based on information from Fortune 500, Vol. 135, No. 8).

Estimate the sample mean, sample variance, and sample standard deviation for profit as percentage of assets.