Beginner Statistics
ANOVA
A Guide to Using Post Hoc Tests with ANOVA
An ANOVA is a statistical test that is used to determine whether or not there is a statistically significant difference between the means of...
Sampling Distributions
Central Limit Theorem: Definition + Examples
The central limit theorem states that the sampling distribution of a sample mean is approximately normal if the sample size is large enough, even if the population...
ANOVA
Kruskal-Wallis Test: Definition, Formula, and Example
A Kruskal-Wallis test is used to determine whether or not there is a statistically significant difference between the medians of three or more independent...
ANOVA
Two-Way ANOVA: Definition, Formula, and Example
A two-way ANOVA (“analysis of variance”) is used to determine whether or not there is a statistically significant difference between the means of three or...
Sampling Distributions
What is a Sampling Distribution?
Imagine there exists a population of 10,000 dolphins and the mean weight of a dolphin in this population is 300 pounds.
If we take a...
Regression
How to Test the Significance of a Regression Slope
Suppose we have the following dataset that shows the square feet and price of 12 different houses:
We want to know if there is a...
Regression
Introduction to Simple Linear Regression
Simple linear regression is a statistical method you can use to understand the relationship between two variables, x and y.
One variable, x, is known...
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