Calculate coefficient of mean deviation from mean for the following data:
100,70 ,200,250,360,490,500,590
Show answer & explanation
Correct answer: D
Explanation
Given data:
100, 70, 200, 250, 360, 490, 500, 590
Mean = (100 + 70 + 200 + 250 + 360 + 490 + 500 + 590)/8
= 2560/8
= 320
Σ|x − 320| = 220 + 250 + 120 + 70 + 40 + 170 + 180 + 270 = 1320
Mean deviation from mean = 1320/8
= 165
Coefficient of mean deviation from mean = 165/320 = 0.515625