Assume that the population proportion is .55. compute the standard error of the proportion, ( ), for sample sizes of 100, 200, 500, and 1000 (to 4 decimals)

The formula to find the standard error :-

, where n is the sample size , P is the population proportion and Q=1-P .

Given : The population proportion

Then,

For n=100

For n=200

For n=500

For n=1000

-8/2y-8=5/y+4-7y+8/y^2-16

we move all terms to the left:

-8/2y-8-(5/y+4-7y+8/y^2-16)=0

we can not solve this equation