Use the normal distribution to find a confidence interval for a
difference in proportions p1-p2 given the relevant sample
results. Assume the results come from random samples.
A 90% confidence interval for p1-p2 given
that p^1=0.77 with n1=500 and p^2=0.64 with n2=210
Give the best estimate for p1-p2, the margin of error, and
the confidence interval.
Round your answer for the best estimate to two decimal places
and round your answers for the margin of error and the confidence
interval to three decimal places.
Best estimate :
Margin of error :
Confidence interval :