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If the arithmetic mean of 8, 4, x, 6, 2, 7 is 5, then the value of x is _________.

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_________ can be used to compare two collections of data.

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The representation of data with bars of uniform width is called _________.

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The median of any data lies between the _________ and _______ observations.

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Median is one of the observations in the data if number of observations is _______.