A population has a known variance of 1878 If you draw random

A population has a known variance of 18.78. If you draw random samples of size 19 and consturct the sampling distribution of x¯ , what would be the value of    _{x¯ ?}

Solution

variance = 18.78

= Sqrt(18.78) = 4.3345

the value of    x¯ = population   x¯/ Sqrt(n) = 4.335/Sqrt(19) = 0.9945