Outliers. There are as many opinions on what to do about them as there are causes for them. But there is a lot of bad advice out there about what ... Continue Reading
Outliers. There are as many opinions on what to do about them as there are causes for them. But there is a lot of bad advice out there about what ... Continue Reading
Repeated measures ANOVA doesn’t cut it for many repeated measures situations, but do you always need mixed models instead? ... Continue Reading
After over 25 years of helping researchers hone their statistical skills to become better data analysts, I've had a few insights about what that ... Continue Reading
From the last posts in this series, you should feel comfortable using Stata’s data editor, changing values and types, and creating new variables. ... Continue Reading
You'll be excited to hear we're doing another Statistics Skills Accelerator for our Statistically Speaking members: Count Models. Stats Skills ... Continue Reading
Once you’ve imported, examined, and cleaned your data, a common next step would be to make some visual displays or graphs. In this article we’ll go ... Continue Reading
There are not a lot of statistical methods designed just for ordinal variables. (There are a few, though.) But that doesn't mean that you're ... Continue Reading
Splines provide a useful way to model relationships that are more complex than a simple linear function. They work with a variety of regression ... Continue Reading
A normal probability plot is extremely useful for checking normality assumptions. It’s more precise than a histogram, which can’t pick up subtle ... Continue Reading
This month we are featuring a 9-module software tutorial by Kim Love: An Introduction to Data Analysis using R. It’s perfect for people who: ... Continue Reading
From the last post in this series, you should know how to change between numeric types and easily change numeric data. We’ll now expand your ... Continue Reading
From our last posts in this series, you should be comfortable with how Stata handles data editing, as well as with making your own variables. In this ... Continue Reading
From our last article, you should feel comfortable with the idea of editing and saving data sets in Stata. In this article, we’ll explain how to ... Continue Reading
The first real data set I ever analyzed was from my senior honors thesis as an undergraduate psychology major. I had taken both intro stats and an ... Continue Reading
In April and May, we're doing something new: including in membership the workshop Interpreting (Even Tricky) Regression Coefficients with Karen ... Continue Reading
Stata makes it a breeze to edit or clean your data. If you’re unfamiliar with using data sets in Stata, check out these blog posts to get a good grasp ... Continue Reading
There are two main types of factor analysis: exploratory and confirmatory. ... Continue Reading
The linear model normality assumption, along with constant variance assumption, is quite robust to departures. That means that even if the assumptions ... Continue Reading
There’s a common saying among pediatricians: children are not little adults. You can’t take a drug therapy that works in adults and scale it down to a ... Continue Reading
Many variables we want to measure just can’t be directly measured with a single variable. Instead you have to combine a set of variables into a single ... Continue Reading
Introduction to Data Analysis with R A 9-Module online tutorial Enroll Now! OVERWHELMED trying to learn R on your own? LOST when trying to ... Continue Reading
Statistical Analysis Plan Review Submit your proposal knowing you've got a solid statistical analysis plan Perfect if: You're about to submit ... Continue Reading
Do you need sample sizes calculated for a grant or thesis proposal? Or simply to make sure you're appropriately sizing your study? You know how ... Continue Reading
Want some 1-on-1 time with one of our consultants? The Analysis Factor website is full of information about statistics and doing data analyses. But ... Continue Reading
statistical consulting Sometimes you need one-on-one intensive guidance. With consulting, you can get a little or a lot of help ... Continue Reading
Hourly Statistical Consulting For when you need guidance and advice for a statistical plan or analysis. Perfect if you have: a need for help to ... Continue Reading
Linear Regression in SPSS A live, 3-session online tutorial, starts April 2nd, 2024 Enroll Now! You open SPSS menus for Regression and ... Continue Reading
Live, Currently Enrolling **** No Live Seminars Currently Scheduled **** Available Seminars Types of ... Continue Reading
Enrolling Introduction to Data Analysis with R Instructor: Kim Love Stage: 1, The Fundamentals Software: R Linear ... Continue Reading
Levels of Measurement and Types of Variables Training Seminar Understand the nuances in determining the types of variables you're working with and ... Continue Reading
Types of Regression Models: Training Seminar 18 Types of Regression Models — What They Are and When to Use Them Enroll Now! Linear, Logistic, ... Continue Reading
Crossed and Nested Factors Training Seminar Understand the difference between crossed and nested factors in multilevel, mixed models, and ... Continue Reading
Multicollinearity Training Seminar Learn best practices for finding and fixing issues caused by multicollinearity in regression models Enroll ... Continue Reading
Introduction to Data Analysis using Stata 9 Module Tutorial — Currently Available Enroll Now! As a researcher, it’s critical for you to know ... Continue Reading
Introduction to Data Analysis with SPSS A 10-Module online tutorial with direct instructor support Enroll Now! OVERWHELMED trying to run ... Continue Reading
effect size statistics, power and sample calculations, and statistical inference Use these resources to learn with The Analysis Factor. Listed below ... Continue Reading
structural equation modeling resources Listed below are workshops, trainings, and articles to help you learn Structural Equation Modeling (SEM). SEM ... Continue Reading
how can The Analysis Factor help you with statistics? ... Continue Reading
Currently Enrolling Logistic Regression for Binary, Ordinal, and Multinomial Outcomes Instructor: Karen Grace-Martin Stage: 3, ... Continue Reading
resources for fundamental statistics Use the resources here to learn fundamental statistics with The Analysis Factor. Listed Below are our Workshop, ... Continue Reading