tag:blogger.com,1999:blog-8542449.post6162185120538222553..comments2021-07-09T09:11:51.623-04:00Comments on Glaivester: Question on Margin of ErrorGlaivesterhttp://www.blogger.com/profile/16867323638154972101noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-8542449.post-54942106071758038752015-11-04T16:37:25.778-05:002015-11-04T16:37:25.778-05:00The statistic is an estimate of the actual value. ...The statistic is an estimate of the actual value. It is conventional to make use of a '95% confidence interval', which is to say you've determined that you can say with 95% confidence that actual value is within the range you offer. (It's been 2/3 of a generation since I've studied it, and it was mostly statistics-as-a-social-science tool and not mathematical statistics, so do not ask me by what method you construct that confidence interval).Art Decohttp://wwrtc.blogspot.comnoreply@blogger.comtag:blogger.com,1999:blog-8542449.post-36009685079750741842015-08-11T11:22:34.850-04:002015-08-11T11:22:34.850-04:00I'll try, but i am very rusty on math.
As n i...I'll try, but i am very rusty on math.<br /><br />As n increases, a binomial distribution approximates a normal distribution, so i will sloppily use its math.<br /><br />Standard deviation is sqrt (n * p * (1 - p))<br /><br />Playing around with numbers, p = .5 and n= 30, sd = 2.73<br />And p = .05, n = 30; sd = 1.19<br /><br /><br />Anonymousnoreply@blogger.com