The market capitalizations of 20 companies, in billions of dollars, are listed to the 149.9 295.6 267.8 257.8 92.5 right. Complete parts (a) and (b). 117.6 42.9 35.3 132.1 295.6 282.5 92.4 234.1 139.3 30.1 24.5 328.1 391.8 21.3 504.5 a. Calculate the mean and standard deviation of the market capitalization for this population of 20 companies. The mean is μ = (Round to three decimal places as needed.)

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