## A Brief Illustration of Regression analysis in Economics

The following regression exercise measures the original relationship between unemployment and real output, as established first by the economist Arthur Okun in the 1960s.

## When do I need to use a repeated measures MANOVA and what data structure do I need?

Before talking about this technique, let’s clarify that when the name repeated measures MANOVA is used, it commonly refers to a repeated measures ANOVA in …

## Logistic regression vs. ordinal logistic regression: getting the interpretation right

Logistic regression models estimate the log odds of the outcome occurring vs the log odds of the outcome not occurring for a given independent variable …

## How do I include categorical variables in my regression model?

One common problem researchers face when running a regression analysis is how to include categorical predictors. Unlike using continuous variables, which you can simply add with no previous manipulation, including categorical variables requires extra work when performing the analysis and interpreting the results.

## Why Do We Need to Know the Data Distribution?

Why do we need to know the data distribution to do our analyses? We need to know how the data are distributed to determine the …

## Analysis Of Variance

ANOVA (Analysis of Variance) is a parametric statistical test. The one-way ANOVA procedure is used when the dependent variable is measured either on an interval …

## Two Treks Through the Same Trauma, With and Without Social Support

This article expands on a hospital diary I began after my second coronary bypass surgery in 1987. My wife, son, and daughter were close at …

## Myths and Truths about Academic Research Projects

Tom Green, Ph.D. Myth #1: Your research project has to be brilliant, truly impress the committee and be published in a prestigious research journal. Truth …

## Data Collection Methodologies for Health Research Projects

Health research is commonly based on a priori knowledge about particular conditions or diseases, and the factors or measures that predict the presence of these …

## Compiling and Managing NHANES Datasets

The National Center for Health Statistics (NCHS) has carried out multiple national studies with measures on a variety of health aspects, and includes data on …

## A Quick Guide for Choosing the Appropriate Statistical Test

How to Know Which Statistical Test to Use The most important step in choosing the appropriate statistical test is to know what the variables of …

## When to Use the Mean, Median and Mode

Mean, Median, and Mode Sometimes you get very similar results with all three. Like when you have a normal distribution. Mean Usually, the mean is …