Statsols Blog

Ronan Fitzpatrick

Recent Posts by Ronan Fitzpatrick:

Power Combined with Precision Helps Improve Sample Size Justification


Topics: Power & Sample Size

Thoughts on the ASA P Values Statement

“When a measure becomes a target, it ceases to be a good measure”

Topics: Industry News

Why is Sample Size important?

Why Calculate Sample Size?

A good statistical study is one that is well designed and leads to valid conclusions. This however, is not always the case, even in published studies. In Cohen’s (1962) seminal power analysis of the journal of Abnormal and Social Psychology he concluded that over half of the published studies were insufficiently powered to result in statistical significance for the main hypothesis.

Topics: Power & Sample Size