1. Find Mean deviation about MODE from the following data
`73,70,71,73,68,67,69,72,76`

Solution:
Mode :
In the given data, the observation `73` occurs maximum number of times (`2`)

`:. Z = 73`

`x`	`|x - Z| = |x - 73|`
73	0
70	3
71	2
73	0
68	5
67	6
69	4
72	1
76	3
---	---
639	24

Mean deviation of Mode
`delta bar x = (sum |x - Z|)/n`

`delta bar x = 24/9`

`delta bar x = 2.6667`


Coefficient of Mean deviation `=(delta bar x)/(bar x)`

`=2.6667/73`

`=0.0365`

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2. Find Mean deviation about MODE from the following data
`69,66,67,69,64,63,65,68,72`

Solution:
Mode :
In the given data, the observation `69` occurs maximum number of times (`2`)

`:. Z = 69`

`x`	`|x - Z| = |x - 69|`
69	0
66	3
67	2
69	0
64	5
63	6
65	4
68	1
72	3
---	---
603	24

Mean deviation of Mode
`delta bar x = (sum |x - Z|)/n`

`delta bar x = 24/9`

`delta bar x = 2.6667`


Coefficient of Mean deviation `=(delta bar x)/(bar x)`

`=2.6667/69`

`=0.0386`

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