Omega Squared Calculator for ANOVA Effect Size
ANOVA is done: You run the test and get a significant F statistic. Your peers are impressed, the p-value is tiny, and yet… does it … Read More
JSCalc
Partial Eta Squared Calculator
So you run an analysis of variance and it’s significant. Great! But you don’t know anything except that from that single test result. A small … Read More
Eta Squared Calculator for ANOVA Effect Size
Finally, after running the analysis, the p-value is looking good. Your experimental group did significantly better then the control. You’re excited to report this! A … Read More
Glass Delta Calculator: Effect Size, CI, d & g
When reading experimental results expressed as raw numbers, it’s hard to know how to interpret them without context. The means were different; ok. But did … Read More
Hedges G Calculator for Standardized Effect Size
OK, so we did our study. We recruited people into the study. We measured outcomes. We have two number that appear to be different. Is … Read More
Cohen D Calculator: Effect Size and CI
This will allow you to interpret statistics propery. For instance, you may read that some new teaching method increased scores by 15 points. Sounds good! … Read More
Effect Size Calculator for Research Results
You run an experiment and the p-value falls below some conventional threshold. Congratulations! Your results is statistically significant. Significance doesn’t tell you how big the … Read More
Power for a Proportion Test Calculator
With a combination of glee and fear you fire off the new checkout button. Traffic flows. Launch is live. And then… nothing. There is no … Read More
Power for a T-Test Calculator
When study results aren’t quite statistically significant… Say your p-value was 0.06; power analysis can help you make sense off them. Maybe you had a … Read More
Type II Error Rate Calculator: Beta and Power
a p-value of 0.07, so you didn’t reject the null hypothesis. 05, so you didn’t reject the null hypothesis. But then you start to wonder, … Read More