Ask Power - Recent questions and answers in FAQ

Answered: No such analysis!

Wed, 25 Feb 2026 02:08:08 +0000

Google - do you know about it?)

Answered: How to cite and provide reference for Univariate and multivariate skewness and kurtosis calculation?

Thu, 08 Feb 2024 03:44:19 +0000

Use this: Cain, M. K., Zhang, Z., & Yuan, K. (2017). Univariate and multivariate skewness and kurtosis for measuring nonnormality: Prevalence, influence and estimation. Behavior Research Methods, 49(5), 1716–1735. https://doi.org/10.3758/s13428-016-0814-1

Answered: Citing Cohen et al for calculation of effect size in 3 arm CRT

Thu, 30 May 2019 17:54:14 +0000

It was based on

Liu, X. S. (2013). Statistical power analysis for the social and behavioral sciences: Basic and advanced techniques. Routledge.

Answered: How to cite WebPower

Fri, 09 Feb 2018 10:29:17 +0000

Removed for violation

Answered: How to register to be a user?

Tue, 04 Nov 2014 12:19:42 +0000

To register, click the link http://webpower.psychstat.org/register.php and input the neccessary information.

For username, please use only letters and numbers. The username needs to start with a letter, not a number.

There are many benefits to register to be a user:

After registration, one can track the power analysis conducted.
Registered users can ask questions on the forum with verification each time.
Registered users can participant the edit of the wiki.

Answered: How to start a new power analysis?

Tue, 04 Nov 2014 12:13:42 +0000

To start a new power analysis, click the link New Analysis in the menu. Then, a list of available power analysis tools will be shown. From the list, select a particular power analysis method and follow the instructuion for that power analysis.

How to use Q & A?

Thu, 10 Apr 2014 14:21:22 +0000

First, use informative question.