Question

Find Mean Deviation from mean 10, 9, 4, 7, 12, 7, 15, 9, 7​

Answer 1

Answer:

First find mean then absolute values

Step-by-step explanation:

Mean=10+9+4+7+12+7+15+9+7/9=80/9

absolute values= |x-Mean|

next formula you can put by yourself

next formula = sum of all absolute values/ total number of observation (i.e. 9 in this case)

Answer 2

Answer:

mean deviation about mean = 2.28

Step-by-step explanation:

mean deviation about mean=

sum |Xi-xbar|/n

here, xbar = mean =8.8

subtracting all observation from mean one by one and avoid negative signs

= 20.6/9 = 2.28

mean deviation about mean = 2.28