Question

Find mean deviation from the mean for the data xi is 10,30,50,70,90 fi is 4,24,28,16,8

Answer 1

10 4 40 40 160

10 4 40 40 16030 24 720 20 480

10 4 40 40 16030 24 720 20 48050 28 1400 0 0

10 4 40 40 16030 24 720 20 48050 28 1400 0 070 16 1120 20 320

10 4 40 40 16030 24 720 20 48050 28 1400 0 070 16 1120 20 32090 8 720 40 320

10 4 40 40 16030 24 720 20 48050 28 1400 0 070 16 1120 20 32090 8 720 40 320= 80

10 4 40 40 16030 24 720 20 48050 28 1400 0 070 16 1120 20 32090 8 720 40 320= 80= 4000

10 4 40 40 16030 24 720 20 48050 28 1400 0 070 16 1120 20 32090 8 720 40 320= 80= 4000=1280

10 4 40 40 16030 24 720 20 48050 28 1400 0 070 16 1120 20 32090 8 720 40 320= 80= 4000=1280Now, we calculate the absolute values of the deviations from mean, and

10 4 40 40 16030 24 720 20 48050 28 1400 0 070 16 1120 20 32090 8 720 40 320= 80= 4000=1280Now, we calculate the absolute values of the deviations from mean, and = 1280

10 4 40 40 16030 24 720 20 48050 28 1400 0 070 16 1120 20 32090 8 720 40 320= 80= 4000=1280Now, we calculate the absolute values of the deviations from mean, and = 1280Hence, the mean deviation about the mean is 16