Need Help? eI Submit Answer Save Progress 3. -3 points 8BUnderStatt 1 32.025 My

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Need Help? eI Submit Answer Save Progress 3. -3 points 8BUnderStatt 1 32.025 My Notes Ask Your ? One way to answer this question is to examine profits as percentage of assets. A random sample of So Fortune 500 companies gave the following information. (Source: Based on information from Fortune 500, Vol. 135, No. 8. tandard deviation for proit as percentage of seEnter our answers to one decimal place.) ) Estimate the sample mean, sample vaniance, and sample Need Help? LRoad Sutemit Assignment Save Assignment Progress Home My Assignments Extension Reques

Explanation / Answer

xbar = sum of xi / 50 = 859.5/50 = 17.19

Variance = 1715.52/49 = 35.0106

Std. dev. = sqrt(35.0106) = 5.917

Class lower upper Midpoint Number Midpoint*number (xi) 1 8.6 12.5 10.55 12 126.6 2 12.6 16.5 14.55 18 261.9 3 16.6 20.5 18.55 6 111.3 4 20.6 24.5 22.55 3 67.65 5 24.6 28.5 26.55 11 292.05

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