Reference no: EM132372779

The market capitalizations of 20? companies, in billions of? dollars, are listed to the right. Complete parts? (a) and? (b).

97.2       116.6    163.8    170.1    41.3

31.9       171.1    37.3       194.3    91.2

87.1       47.1       103.2    136.3    3.2

7.2         284.1    323.4    18.2       390.8

a. Calculate the mean and standard deviation of the market capitalization for this population of 20 companies.

The mean is u =__________?(Round to three decimal places as? needed.)

The standard deviation is σ = _______ (Round to three decimal places as needed)

b. Interpret the parameters calculated in? (a). Assume that for market? capitalizations, a standard deviation is large as a portion of the mean if it is greater than? 25% of the mean. Choose the correct answer below.

A. The standard deviation is small as a portion of the mean. This indicates that the values are relatively concentrated.

B. The standard deviation is small as a portion of the mean. This indicates that the values are relatively spread out.

C. The standard deviation is large as a portion of the mean. This indicates that the values are relatively spread out.

D. The standard deviation is large as a portion of the mean. This indicates that the values are relatively concentrated.