99 Percentile Qs Bank for JEE MainMathematicsStatistics

The mean deviation from the mean for the observations 1,3,5,7,11,13,17,19,23 is

Options

A6
B11 4 9
C11
D6 2 9

Correct answer

D. 6 2 9

Step-by-step solution

Given observation are 1, 3, 5, 7, 11, 13, 17, 19, 23 . aligned & x = 1+3+5+7+11+13+17+19+23 9 = 99 9 =11 & Mean deviation about mean = 1 x _ i-1 ^n x₁- x & = 1 9 [ array l 1-11|+| 3-11|+| 5-11|+| 7-11|+| 11-11 +] 13-11|+| 17-11|+| 19-11|+| 23-11 array ] & = 1 9 [10+8+6+4+0+2+6+8+12]= 56 9 & =6 2 9 aligned

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