If the observations 1,2,3,….,n occur with frequency n,n-1,n-2,..,1 respectively such that the mean of observations is 13/3, then n is equal to

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MARKS Content Team · Accepted Answer

Correct answer: (B) 11. Mean =(∑f_ix_i)/(∑f_i)=(∑r=1)/(nrn+1-rnn+12)=13/3 (given) ⇒(nn+1)/2·n+1-(nn+12n+1)/6(nn+1)/2=13/3 ⇒n+1-(2n+1)/3=13/3⇒n/3+2/3=13/3⇒n=11

If the observations $1, 2, 3, \dots ., n$ occur with frequency $n, (n - 1), (n - 2), . ., 1$ respectively such that the mean of observations is $\frac{13}{3},$ then $n$ is equal to

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More Statistics Questions

If the observations 1,2,3,….,n occur with frequency n,n-1,n-2,..,1 respectively such that the mean of observations is 133, then n is equal to

Solution

More Statistics Questions

If the observations $1, 2, 3, \dots ., n$ occur with frequency $n, (n - 1), (n - 2), . ., 1$ respectively such that the mean of observations is $\frac{13}{3},$ then $n$ is equal to