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Saturday, July 26, 2025

Statology

One-Way ANOVA: Definition, Formula, and Example

A one-way ANOVA (“analysis of variance”) compares the means of three or more independent groups to determine if there is a statistically significant difference between...

Chi-Square Goodness of Fit Test: Definition, Formula, and Example

A Chi-Square goodness of fit test is used to determine whether or not a categorical variable follows a hypothesized distribution. This tutorial explains the following: The motivation...

Here is How to Interpret a P-Value of 0.000

When you run a statistical test, whether it’s a chi-square test, a test for a population mean, a test for a population proportion, a...

What are Confidence Intervals?

Often in statistics we’re interested in measuring population parameters – numbers that describe some characteristic of an entire population. Two of the most common population parameters...

What Are Random Variables?

A random variable, typically denoted as X, is a variable whose possible values are outcomes of a random process. There are two types of random...

Explanatory & Response Variables: Definition & Examples

Two of the most important types of variables to understand in statistics are explanatory variables and response variables. Explanatory Variable: Sometimes referred to as an independent variable or...

Theoretical Probability: Definition + Examples

Probability is a topic in statistics that describes the likelihood of certain events happening. When we talk about probability, we’re often referring to one...

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