e standard deviation of a population of 100 volumes is 60 cm. In the case of "non-refundable selection", find how many units the sample should consist of so that the standard error of the mean is not more than 20 cm? a) 14 B) 36 C) 9

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The standard deviation of a population of 100 volumes is 60 cm. In the case of "non-refundable selection", find how many units the sample should consist of so that the standard error of the mean is not more than 20 cm?

a) 14



B) 36



C) 9



D) 21



E) 17

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