To assess the state of business activity of industrial etc.

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To assess the state of business activity of the industrial enterprises of different ownership forms were conducted random surveys of business with the following results:
Intervals of values \u200b\u200bof the index of business activity (in points) 0 - 8 8 - 16 16 - 24 24 - 32
The number of enterprises (open joint stock companies) on October 15 on May 8

Construct a frequency distribution histogram. Find the average value of the index of business activity, variance, standard deviation, coefficient of variation. Explain the results.

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