Compute the mean, standard deviation, and coefficient of variation for NPW and PHS.

The following information from Best’s Aggregates and Averages can be used for question. You are given the following information on the property–casualty insurance industry. NPW (net premiums written) is a measure of the dollar value of premiums written in property–casualty insurance (such as auto insurance, home insurance, and so on). PHS (policyholders’
surplus) is a measure of the net worth, or equity, of an insurer:

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Insurance industry Year 1967 1968 1969 1970 NPW 23,583 25,766 28,956 32,578 PHS 14,802 16,192 13,964 15,499