Statistics · Mean deviation about median
The mean and variance of 10 observations are 9 and 34.2, respectively. If 8 of these observations are 2, 3, 5, 10, 11, 13, 15, 21, then the mean deviation about the median of all the 10 observations is
- (1)5
- (2)4
- (3)6
- (4)7
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