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...
Statology
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...
Statology
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...
Statology
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...
Statology
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...
Statology
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...
Statology
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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