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

179.9178.7184.8179.3165.5

156.8161.9186.7174.7188.3

187.1173.8160.7174.6147.6

149.5196.1190.6144.7214.5

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 = _______ (Round to three decimal places as needed)

b. Interpret the parameters calculated in(a). Assume that for marketcapitalizations, a standard deviation is large as a portion of the mean if it is greater than25% 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.