N - e 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. 12.6-16.5 | 16.6-20.5 | 20.6-24.5 | 24.6-28.5 Profit as percentage of assets | 8.6-12.5 Number of companies 11 16 Estimate the sample mean, sample variance, and sample standard deviation for profit as percentage of assets. (Round your answers to three decimal places.) x [18310