Assume that a sample of size 600 is to be taken from a popul

Assume that a sample of size 600 is to be taken from a population in which 35% of the items fall into the category of interest. Also assume that the sample proportion of successes, p-bar, is to be calculated. Find the standard deviation of p-bar.

Solution

Proportion ( P ) =0.35
Standard Deviation ( sd )= Sqrt (P*Q /n) = Sqrt(0.35*0.65/600) = 0.01947