Tag: statistics

I recently came across a financial update with a plot that looks like the one below: a bar plot of revenue with a line plot of growth rate. The growth...

If you plan working data analysis or processing, read the excellent post in the “stats with cats blog” titled “35 Ways Data Go Bad” post. I did experience each and...

Do you sometimes Google for something only to find stuff written by yourself? I teach a course called “data-based decision making.” While googling for examples of statistics misuse, I stumbled...

Traditional A/B testsing rests on a fundamentally flawed premise. Most of the time, version A will be better for some subgroups, and version B will be better for others. Choosing...

This is an interesting thought experiment. Suppose that you have some appliance that acts in a normally distributed way. For example, a nerf gun. Let’s say now that you aim...

Here’s a quiz A healthy woman with no risk factors gets a positive mammogram result during a routine annual check. What is the probability that she actually has a breast...

Overfitting is a situation in which a model accurately describes some data but not the phenomenon that generates that data. Overfitting was a huge problem in the good old times,...

Does Caring About the Analysis Matter? The simplystatistics.org blog had an interesting discussion about podcast Roger Peng from simplystatistics.org recorded on A/B testing on Etsy. One of the late conclusions...

“stat” in the word “statistics” means “state”, as in “government/sovereignty”. Statistics was born as a state effort to use data to rule a country. Even today, every country I know...

A couple of days ago, I told to my oldest daughter about the Monty Hall problem, the famous probability puzzle with a counter-intuitive solution. My daughter didn’t believe me. Even...

Compiled by my teammate Yanir Serourssi, the following is a reading list an A/B tests that you should read even if you don’t plan to perform an A/B test anytime...