Question

If there are 3 observations 15,20,25then the sum of deviation of the observations from their AM is

Answer 1

There are 3 observation 15 20 25

So 15+20+25/3= 20

The sum of deviation of observation of their arithmetic mean is

15-20= -5

20-20=0

25-20=5

So -5+0+5 = 0

Answer 2

Answer:

0

Step-by-step explanation:

Total number of observations = 3 (Given)

Observations = 15 20 and 25 (Given)

Mean is the average used to derive the central tendency of the given data. It is the average of the numbers and is calculated by adding up all the numbers, and then divide by the total numbers. Thus, it is the sum divided by the count

Mean of 15,20,25

= 15+20+25/3

= 60/3

= 20

Hence,15-20 = -5, 20-20=0 and 25-20= 5.

Therefore, the sum of deviation of the observation from their mean will be -

= 20-20 = 0.

Thus,  sum of deviation of the observations from their AM is 0.