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Mean of 'n' observations is X. if we add 1 into 1st Observation, 2 into 2nd observation and than so on so what will be new mean? |
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Answer» i think this is RIGHT ans for you 3,252 Views Step-by-step explanation: Mean of x1,X2,...xn is x nx1+x2+x3+...+xn=x ⇒i=1∑nx=nx __(1) on adding 1 to x1,2 to x2 and so on we get x1+1+x2+2+...+xn+n =(x1+x2+...+xn)+(1+2+...+n) =∑n+2n(n+1) NEW mean =nNewsummation =n∑n+2n(n+1) |
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