# margin of error

• December 10th 2009, 01:22 PM
superman31
margin of error
find the margin of error (E) that corresponds to the given statistics and confidence level.

98% confidence; the sample size is 1230, of which 40% are successful.
• December 11th 2009, 03:18 PM
abender
98% confidence level translates to a 2.326348 z score.

MOE = $\sqrt{\frac{(p)(1-p)}{n}} 2.326348$

Can you finish it from here?

-Andy