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Measures of Variability

While central tendency is important, we often want to understand more than just were the center of a distribution is located, we often also find useful measures of the spread of the values around the center. Such statistics are referred to as measures of dispersion or variability. Common measures I will discuss in this tutorial include the range, interquartile range, variance, and standard deviation.

Measures of Central Tendency

Central Tendency is an important statistics in much of research. The goal is to simplify our data to one representative value. Before you do this you must make sure your measure of central tendency is appropriate for your data. In this tutorial I will introduce you to the most common ways to calculate central tendency

Exploring Data Graphically

Before we start simplifying our data with descriptive statistics and then models, we should always explore all the data. A great way to do that is graphically.

FIML in Lavaan: Regression Analysis with Auxiliary Variables

This is the third tutorial in a series that demonstrates how to us full information maximum likelihood (FIML) estimation using the R package `lavaan`.

Prepare SPSS Data for Mplus

This tutorial demonstrates how to prepare data from SPSS for use with Mplus.

FIML in Lavaan: Regression Analysis

This tutorial demonstrates how to use full information maximum likelihood (FIML) estimation to deal with missing data in a regression model using `lavaan`.

FIML in Lavaan: Descriptive Statistics

A new article created using the Distill format.

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