Question

the mean of n observations is x bar. If the first observation is increased by 1,the second by 2 and so on, the new mean is dash​

Answer 1

Answer:

x bar +n(n+1)/2n

Step-by-step explanation:

as we know

1+2+3+....n=n(n+1)/2

but for mean

(1+2+3+...+n)÷n=n(n+1)/2n

old mean is as it was ago

therefore new mean formed will be

xbar + n(n+1)/2n