Click on the following links. Please note these will open in a new window.

Video Resource

Video 1: The Theory Behind Statistical Significance

Learning Objective: 6-2: The importance of the sampling distribution.

Description: Cartoon that explains central limit theorem, the theory behind statistical significance testing, using examples of rabbit weights and dragon wingspans.

Web Resources

Web 1: Interpret Results

Learning Objective: 6-5: The distinction between statistical significance, effect size, confidence intervals, and practical significance.

Description: Provides visual explanations of how to interpret statistical significance and effect sizes. Also discusses practical significance.

Web 2: Cohen’s d Effect Size

Learning Objective: 6-5: The distinction between statistical significance, effect size, confidence intervals, and practical significance.

Description: An interactive visualization of Cohen’s d effect size.

Data sets

Practice calculating confidence intervals with a data analysis program. Use any of the data sets available on the “Datasets” tab.