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If there are 3 observations 15, 20, 25 then the sum of deviation of the observations from their AM is
- a)0
- b)5
- c)–5
- d)None of these.
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
If there are 3 observations 15, 20, 25 then the sum of deviation of th...
0
Explanation:
The mean or average of the three observations is (15+20+25)/3 = 20.
The deviations of the observations from the mean are:
- 15 - 20 = -5
- 20 - 20 = 0
- 25 - 20 = 5
The sum of these deviations is (-5) + 0 + 5 = 0.
Therefore, the answer is option (a) 0.
Explanation:
The mean or average of the three observations is (15+20+25)/3 = 20.
The deviations of the observations from the mean are:
- 15 - 20 = -5
- 20 - 20 = 0
- 25 - 20 = 5
The sum of these deviations is (-5) + 0 + 5 = 0.
Therefore, the answer is option (a) 0.
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If there are 3 observations 15, 20, 25 then the sum of deviation of the observations from their AM isa)0b)5c)–5d)None of these.Correct answer is option 'A'. Can you explain this answer?
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