Diff for "FAQ/pvalsdef" - CBU statistics Wiki
location: Diff for "FAQ/pvalsdef"
Differences between revisions 9 and 10
Revision 9 as of 2012-07-09 13:32:01
Size: 679
Editor: PeterWatson
Comment:
Revision 10 as of 2013-03-08 10:17:25
Size: 680
Editor: localhost
Comment: converted to 1.6 markup
Deletions are marked like this. Additions are marked like this.
Line 4: Line 4:
The p-value is the probability of a particular statistic from the data, or a more extreme one, occurring under the null hypothesis (see e.g. Everitt, 1995). A p-value should not be confused with a type I error which is the probability of falsely ''rejecting'' the null hypothesis when it is true. The former does not involve any concept of ''rejection'' or ''acceptance''. The type I ''error'' on the other hand does. See also the Graduate Statistics [:StatsCourse2009: talk on power analysis] for further discussion. The p-value is the probability of a particular statistic from the data, or a more extreme one, occurring under the null hypothesis (see e.g. Everitt, 1995). A p-value should not be confused with a type I error which is the probability of falsely ''rejecting'' the null hypothesis when it is true. The former does not involve any concept of ''rejection'' or ''acceptance''. The type I ''error'' on the other hand does. See also the Graduate Statistics [[StatsCourse2009| talk on power analysis]] for further discussion.

What is a p-value?

The p-value is the probability of a particular statistic from the data, or a more extreme one, occurring under the null hypothesis (see e.g. Everitt, 1995). A p-value should not be confused with a type I error which is the probability of falsely rejecting the null hypothesis when it is true. The former does not involve any concept of rejection or acceptance. The type I error on the other hand does. See also the Graduate Statistics talk on power analysis for further discussion.

Reference

Everitt BS (1995) The Cambridge Dictionary of Statistics in the Medical Sciences. Cambridge University Press.

None: FAQ/pvalsdef (last edited 2013-03-08 10:17:25 by localhost)