The arithmetic mean of the set of observations 1²,2²'3² ........ n²?is
(n+1)(2n+1)
n(n+1)
(n-1)(2n +1)
D (n+1)(2n-1)
D) -
96
6
Answers
Answered by
2
Heya,
To answer this question
we need to summarise some formulas .They are mentioned below
Hence, mean whose formula is
Applying the above formula, we get mean =
Hence, the required mean is :-
Regards
Kshitij
Answered by
2
Answer:
here is ur answer
1+2+3+4+....n=
2
n(n+1)
1
2
+2
2
+3
2
+.....n
2
=
6
1n(n+1)(2n+1)
1
3
+2
3
+3
3
+.......n
3
=
2
2
n(n+1)
2
Hence, mean whose formula is
sumofallobsnoofobs\frac{sum \: of \: all \: obs}{no \: of \: obs}
noofobs
sumofallobs
Applying the above formula, we get mean =
16n(n+1)(2n+1)n\frac{ \frac{1}{6} n(n + 1)(2n + 1)}{n}
n
6
1
n(n+1)(2n+1)
Hence, the required mean is :-
1(n+1)(2n+1)6\frac{1(n + 1)(2n + 1)}{6}
6
1(n+1)(2n+1)
here
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