Question

Find the mean of the observations 4, 7, 8, 9, 10, 12,13, 17.​

Answer 1

Step-by-step explanation:

Mean(

x

)=

8

4+7+8+9+10+12+13+17

=

8

80

=10

x

i

∣x

i

−

x

∣

4 6

7 3

8 2

9 1

10 0

12 2

13 3

17 7

∑∣x

i

−

x

∣=24

⇒ Mean deviation about mean =

8

24

=3