Psych Exam Review

05/16/2025

New Video! The Sampling Distribution of the Mean and Standard Error

In this video I explain the sampling distribution of the mean, a comparison distribution for thinking about the probability of different mean values selected...

05/01/2025

New video! Statistical Significance & Probability Values

In this video I explain the concept of statistical significance, including alpha levels, probability values (p-values) and the critical region or rejection r...

02/09/2025

New video! The Logic of Null Hypothesis Significance Testing

In this video I explain the logic of null hypothesis significance testing and how researchers use a null hypothesis and a comparison distribution or sampling...

10/16/2024

New video! How to Use a Z-Table (Standard Normal Table)

In this video I explain how to use a z-table or a standard normal table in order to calculate the percentage of scores below, above, or between z-scores for ...

08/14/2024

New Video on the Psych Exam Review YouTube channel!

In this video I explain how we can use the equation for a normal curve to generate a probability density function and use that to estimate probabilities. Whi...

06/24/2024

Didn't know "Don't Mess with Texas" started as an anti-litering campaign slogan in 1985 (from Thaler & Sunstein's "Nudge")

06/21/2024

New video on the PsychExamReview YouTube channel: What is a Probability Density Function? https://psychexamreview.com/what-is-a-probability-density-function/

05/30/2024

New video on the Psych Exam Review YouTube channel: How Are Moments Used in Statistics?

In this video I explain how moments are used in statistics in order to describe the characteristics of a distribution. The first four moments help to tell us...

05/25/2024

New video on the PsychExamReview YouTube channel: What is Kurtosis?

In this video I explain the concept of kurtosis. I explain the terminology for kurtosis coined by Karl Pearson, a number of common misconceptions related to...

10/07/2023

Psychology in 22 Minutes - a comprehensive overview of the subfields of psychology and how they fit together

In this video I provide a comprehensive overview of the many subfields of psychology and how these fit together to provide a deeper understanding of the comp...