A random sample of 90 prisoners in a large state prison revealed that 20% were college graduates. Find the 99% confidence interval in the population sampled for the percentage of prisoners who are college graduates.© BrainMass Inc. brainmass.com March 4, 2021, 5:56 pm ad1c9bdddf
p=proportion of college graduates= 20.00%
n=sample size= 90
s p=standard error of proportion= square root of (pq/n)= 4.22% = square root of ( 20.% * ...
The solution calculates the 99% confidence interval in the population sampled for the percentage of prisoners who are college graduates.