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Find the mean deviation about the mean of the distribution $x = 2$ , 4, 6, 8, 10 with frequencies 1, 4, 6, 4, 1.

Competition practiceStatistics

A1.5
B2
C1.2
D4.8

Step-by-Step Solution

Mean

= 6

(symmetric),

N = 16.Σ f ∣ x - 6∣ = 4 + 8 + 0 + 8 + 4 = 24

; MD

= \frac{24}{16} = 1.5

. (2 is the SD; 4.8 divides by the 5 rows.)

Answer: A) 1.5

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