if the random error in the arithmetic mean of 50 observation is x then the random error in the arithmetic mean of 150 observations would be

:

As the no of observation increases the random error will decrease. So 150/50 = 3 therefore random error will decrease by 1/3, which is x/3.

Call us: 90-26-27-28-29, 9157460799, 02614055508

Or, Fill out the form & get a call back.