Is the margin of error equal to two standard deviation?

For example in problem one is the standard deviation .01 because the margin of error is 2%?

And after that do I use the formula and solve for n?

You are currently using guest access (Login)

Is the margin of error equal to two standard deviation?

For example in problem one is the standard deviation .01 because the margin of error is 2%?

And after that do I use the formula and solve for n?

what about with a 97% confidence level? then its not 2 standard deviations, is it? do u just have to find the z for 97%?

and also how do u find confidence level? basically im having trouble with #2 and #4.

and also how do u find confidence level? basically im having trouble with #2 and #4.