Karen Grace-Martin – Medium

Karen Grace-Martin

Featured Book

Data Analysis with SPSS: A First Course in Applied Statistics

Data Analysis with SPSS: A First Course in Applied Statistics

Designed to teach students how to explore data using the most popular professional social statistics program on the market today.

2010

Karen Grace-Martin, et al.

Karen Grace-Martin, Stephen Sweet

Stories

Pinned

Karen Grace-Martin

How to Analyze Pre-Post Data

One area in statistics where I see conflicting advice is how to analyze pre-post data. I’ve seen this myself in consulting. A few years…

Jan 22, 2013

How to Analyze Pre-Post Data

Jan 22, 2013

Pinned

Karen Grace-Martin

Choosing and Using Effect Size Statistics

If you’re in a field that uses Analysis of Variance, you have surely heard that p-values don’t indicate the size of an effect. You also…

Jan 13, 2011

Choosing and Using Effect Size Statistics

Jan 13, 2011

Pinned

Karen Grace-Martin

When it Makes Sense to Categorize a Continuous Predictor in a Regression Model

Three Situations When it Works

Jul 24, 2009

When it Makes Sense to Categorize a Continuous Predictor in a Regression Model

Jul 24, 2009

Karen Grace-Martin

When To Fight For Your Analysis and When To Jump Through Hoops

In the world of data analysis, there’s not always one clearly appropriate analysis for every research question.

6d ago

6d ago

Karen Grace-Martin

EM Imputation and Missing Data: Is Mean Imputation Really so Terrible?

I’m sure I don’t need to explain to you all the problems that occur as a result of missing data. Anyone who has dealt with missing data —…

May 29

EM Imputation and Missing Data: Is Mean Imputation Really so Terrible?

May 29

Karen Grace-Martin

Multiple Imputation in a Nutshell

Imputation as an approach to missing data has been around for decades.

May 22

Multiple Imputation in a Nutshell

May 22

Karen Grace-Martin

When Assumptions of ANCOVA are Irrelevant

Every once in a while, I work with a client who is stuck between a particular statistical rock and hard place. It happens when they’re…

May 15

When Assumptions of ANCOVA are Irrelevant

May 15

Karen Grace-Martin

What’s in a Name? Moderation and Interaction, Independent and Predictor Variables

One of the most confusing things about statistical analysis is the different vocabulary used for the same, or…

May 8

What’s in a Name? Moderation and Interaction, Independent and Predictor Variables

May 8

Karen Grace-Martin

The Difference Between Interaction and Association

It’s really easy to mix up the concepts of association (as measured by correlation) and interaction. Or to assume if two variables…

May 1

The Difference Between Interaction and Association

May 1

Karen Grace-Martin

5 Steps for Calculating Sample Size

Nearly all granting agencies require an estimate of an adequate sample size to detect the effects hypothesized in the study. But all…

Apr 24

5 Steps for Calculating Sample Size

Apr 24

Karen Grace-Martin

Karen Grace-Martin

Book Author

Karen is founder of The Analysis Factor and its signature program, Statistically Speaking. Her mission is to create light bulb moments about statistics.

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