### What is the arithmetic mean primary earnings per share

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The annual report of Dennis Industries cited these primary earnings per common share for the past 5 years: \$2.68, \$1.03, \$2.26, \$4.30, and \$3.58. If we assume these are pop- ulation values, what is:

a. The arithmetic mean primary earnings per share of common stock?

b. The variance?

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