Which diagnostic test metric is most similar to statistical power?
Sensitivity is the diagnostic test metric most similar to statistical power: both measure the ability to detect something, either disease (sensitivity) or an effect (power).
How will increasing effect size affect statistical power?
The bigger an effect is, the easier it is to see. Think of the "Where's Wally/Waldo" game (https://en.wikipedia.org/wiki/Where%27s_Wally%3F): if Wally/Waldo were made bigger, he would be easier to see.
How will decreasing effect variability affect statistical power?
The less variability an effect has, the easier it is to see. Think of the "Where's Wally/Waldo" game (https://en.wikipedia.org/wiki/Where%27s_Wally%3F): if you got rid of all of the stuff around Wally/Waldo, he would be easier to see.
How will increasing sample size affect statistical power?
Increasing sample size increases statistical power. Think back to the coin toss example.
This brief visual tutorial is intended to provide an intuitive understanding of statistical power. Make sure to cement your knowledge of this difficult material by answering the 4 quiz questions!