Question

if the mean of 12 observations is 24 and each observation is decreased by 2 , what will be the new mean?

Answer 1

subtrected 2 from 24 then new mean is 22
because isko karne keliye ek therom hota hai jitna decreased hota hai sabhi observation me utna hi mean me decreased kr dete hai

Answer 2

mean = sum of all observations /no of observations
24= sum of all observations / 12
=>sum of all observations= 288
new mean=288-(12×2)/12
new mean=288-24/12
=> new mean =264/12
=22

i hope it helps u dear ❤ ❤