Posted by Thomas on Wednesday, June 15, 2011 at 10:35pm.
A group of scientists created 150 trials to measure whether electric shock treatment could cure paranoid delusions. Of these trials, 52 were successful. Find the margin of error E that corresponds to a 95% confidence level. The critical value for 95% confidence level is 1.96.

Statistics  MathGuru, Thursday, June 16, 2011 at 4:58pm
Margin of error = 1.96 * √(pq/n)
p = 52/150
q = 1  p
n = 150
Convert fractions to decimals. Substitute decimals into the above equation and solve for margin of error.
I hope this will help get you started.