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Stephanie Glen
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  • Jacksonville, FL
  • United States
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Stephanie Glen's blog post was featured

The Lifecycle of Data

The lifecycle of data travels through six phases:The lifecycle "wheel" isn't set in stone. While it's common to move through the phases in order, it's possible to move in either direction (i.e. forward, backward) at any stage in the cycle. Work can also happen in several phases at the same time, or you can skip over entire phases. In addition, if new information is…See More
20 hours ago
Stephanie Glen's 2 blog posts were featured
Saturday
Stephanie Glen's blog post was featured

Alternatives to R-squared (with pluses and minuses)

R-squared can help you answer the question "How does my model perform, compared to a naive model?". However, r2 is far from a perfect tool. Probably the main issue is that every data set contains a certain amount of unexplainable data. R-squared can't tell the difference between the explainable and the unexplainable , so it will go…See More
Jun 10
Mukesh Bhandarkar liked Stephanie Glen's profile
Jun 8
Tim Matteson liked Stephanie Glen's blog post The Lifecycle of Data
Jun 3
Stephanie Glen's 2 blog posts were featured
May 31
Viridiana Veytia liked Stephanie Glen's blog post Bayes Theorem in One Picture
May 30
Rakesh Chintha liked Stephanie Glen's blog post Naive Bayes in One Picture
May 30
Rakesh Chintha liked Stephanie Glen's blog post Cross Validation in One Picture
May 29
Norberto J. Sanchez liked Stephanie Glen's blog post ROC Curve Explained in One Picture
May 26
Stephanie Glen's blog post was featured

Cross Validation in One Picture

Cross Validation explained in one simple picture. The method shown here is k-fold cross validation, where data is split into k folds (in this example, 5 folds). Blue balls represent training data; 1/k (i.e. 1/5) balls are held back for model testing.Monte Carlo cross validation works the same way, except that the balls would be chosen with replacement. In other words, it would be possible for a ball to appear in more than one sample.…See More
May 25
Nicola Atzori liked Stephanie Glen's blog post Confidence Intervals in One Picture
May 20
Clifford Dibble liked Stephanie Glen's profile
May 18
Stephanie Glen's 2 blog posts were featured
May 17
Chris Hogan liked Stephanie Glen's blog post The Lifecycle of Data
May 13
Stephanie Glen commented on Stephanie Glen's blog post The Lifecycle of Data
"Masoud Sadeghi,  I based the wheel inclusions on how much they made sense to me. It's more of an "intro" to the lifecycle of data, a meta analysis of existing cycles, rather than something innovative. As far as advantages, I…"
May 11

Profile Information

Short Bio
Stephanie Glen is Editorial director at DataScienceCentral.com. She is a mathematician and statistician. After working for several years teaching mathematics and statistics at the university level, she created and developed the website StatisticsHowTo.com.
Field of Expertise
Other
Professional Status
Executive
Years of Experience:
14
Your Company:
Andale Publishing, LLC
Industry:
Mathematics Education
Your Job Title:
CEO
Interests:
Contributing

Stephanie Glen's Blog

Assumptions of Linear Regression in One Picture

Posted on June 15, 2019 at 7:53am 0 Comments

If any of the main assumptions of linear regression are violated, any results or forecasts that you glean from your data will be extremely biased, inefficient or misleading. Navigating all of the different assumptions and recommendations to identify the assumption can be overwhelming (for example, normality has more than half a dozen options for testing).
This image highlights the assumptions and the most common testing options.…
Continue

Alternatives to R-squared (with pluses and minuses)

Posted on June 10, 2019 at 5:30am 0 Comments

R-squared can help you answer the question "How does my model perform, compared to a naive model?". However, r2 is far from a perfect tool. Probably the main issue is that every data set contains a certain amount of unexplainable data. R-squared can't tell the difference between the explainable and the…

Continue

R-Squared in One Picture

Posted on May 31, 2019 at 8:00am 0 Comments

R-squared measures how well your data fits a regression line. More specifically, it's how much variation in the…

Continue

Cross Validation in One Picture

Posted on May 25, 2019 at 8:30am 0 Comments

Cross Validation explained in one simple picture. The method shown here is k-fold cross validation, where data is split into k folds (in this example, 5 folds). Blue balls represent training data; 1/k (i.e. 1/5) balls are held back for model testing.

Monte Carlo cross validation works the same way, except that the balls would be chosen with replacement. In other words, it would be possible for a ball to appear in more than one sample.…

Continue

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