If the number of observations in the data is more and/or figures are large, we use _____ for calculating mean.

direct method

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assumed mean method

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step deviation method

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either B or C

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Solution

The correct option is D either B or C
In assumed mean method and step deviation method, the data of the given class is reduced into smaller units which makes it easy to do calculation and ascertain the mean of the class. Therefore, these methods of calculating mean is very appropriate when the data given has very large figures.

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