Calculate Confidence Level From Sample Size. The confidence interval is the plus-or-minus figure usually reported in newspaper or television opinion poll results. 1 - P C2.
When do you use confidence intervals. That if you had asked the question of the entire relevant population between 43 47-4 and 51 474. Hit the calculate button.
If youd like to do the calculation by hand use the following formula.
That if you had asked the question of the entire relevant population between 43 47-4 and 51 474. Confidence Interval 0 - 100 If population is small the sample size need adjustment as follows otherwise just leave the population field empty. So if this is for a nationwide poll in a large country with millions of eligible subjects you can ignore that part. When do you use confidence intervals.
