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Beginner Statistics

How to Find a Confidence Interval for a Median (Step-by-Step)

We can use the following formula to calculate the upper and lower bounds of a confidence interval for a population median: j: nq  –  z√nq(1-q) k:...

An Introduction to the Exponential Distribution

The exponential distribution is a probability distribution that is used to model the time we must wait until a certain event occurs. This distribution can...

An Introduction to the Uniform Distribution

The uniform distribution is a probability distribution in which every value between an interval from a to b is equally likely to occur. If a...

The Breusch-Pagan Test: Definition & Example

One of the key assumptions of linear regression is that the residuals are distributed with equal variance at each level of the predictor variable....

Introduction to Multiple Linear Regression

When we want to understand the relationship between a single predictor variable and a response variable, we often use simple linear regression. However, if we’d...

Dunn’s Test for Multiple Comparisons

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 groups....

How to Use Dunnett’s Test for Multiple Comparisons

An ANOVA (Analysis of Variance) is used to determine whether or not there is a statistically significant difference between the means of three or...

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