Statement of a problem № m193


All eight companies in the aerospace industry were surveyed as to their return on investment last year. The results are (in percent) 10.6, 12.6, 14.8, 18.2, 12.0, 14.8, 12.2, and 15.6. (a) Range, (b) Arithmetic mean, (c) Variance, and (d) Interpret the statistics.

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