Chi-square Tests Overview

Word cloud about Chi-square tests

Chi-square tests are very useful in understanding relationships and proportions. This is a concise overview.

Tail of the Test?

Dog looking at tail

How to determine which side of the distribution to use in your hypothesis test.

What is p-value?

What is p-value

Understanding p-value is often a challenge for stats students. Here is a focused explanation.

Measurement Scales

Feet on bathroom scales

This is a student’s question about the NOIR acronym for the most common measurement scales. Here is my answer:

Z or T?

Koala sleeping - woman drinking tea.

Picking the right distribution to use for your hypothesis test is important. For comparing means, we use either the z or the t-distribution. Here’s how to choose the right one.