Author Archives: statswithcats

About statswithcats

Charlie Kufs has been crunching numbers for over thirty years. He retired in 2019 and is currently working on Stats with Kittens, the prequel to Stats with Cats.

A Typology of Data Relationships

Nine patterns of three types of relationships that aren’t spurious. When analysts see a large correlation coefficient, they begin speculating about possible reasons. They’ll naturally gravitate toward their initial hypothesis (or preconceived notion) which set them to investigate the data relationship … Continue reading

Posted in Uncategorized | Tagged , , , , | Leave a comment

The Evolution of Data Science … As I Remember It

Those who cannot remember the past are condemned to repeat it. George Santayana History isn’t always clear-cut. It’s written by anyone with the will to write it down and the forum to distribute it. It’s valuable to understand different perspectives … Continue reading

Posted in Uncategorized | Tagged , , , , , , , , , , , , , , , , | 2 Comments

PII. The Great Taboo of Data Analysis

Many of us have had our personal information stolen from the Internet, some more than once. Even governments can’t prevent the thefts. Professionals who work with data come under a lot of scrutiny because of PII. Continue reading

Posted in Uncategorized | Tagged , , , | Leave a comment

Anecdotes and Big Data

An anecdote is a kitten gently licking your face with a warm, wet,
raspy tongue. Big data is a three-inch, high-pressure, firehose held an arm’s length away. They have to be treated quite differently.
Continue reading

Image | Posted on | Tagged , , , | Leave a comment

WHAT ARE THE ODDS?

Probability is the core of statistics. You hear the phrase “what’s the probability of …” all the time in statistics. You also hear that phrase in everyday life, too. What’s the probability of rain tomorrow? What’s the probability of winning … Continue reading

Posted in Uncategorized | Tagged , , , , | Leave a comment

WHY YOU NEED TO TAKE STATS 101

Whether you’re in high school, college, or a continuing education program, you may have the opportunity, or be required, to take an introductory course in statistics, call it Stats 101. It’s certainly a requirement for degrees in the sciences and … Continue reading

Posted in Uncategorized | Tagged , | Leave a comment

PROBABILITY IS SIMPLE … KINDA

Language isn’t very precise in dealing with uncertainty. Probably is more certain than possibly, but who knows where dollars-to-doughnuts falls on the spectrum. Statistics needs to deal with uncertainty more quantitatively. That’s where probability comes in. For the most part, … Continue reading

Posted in Uncategorized | Tagged , , , , , , , , , | 1 Comment

What To Look For In Data

Sometimes you have to do things when you have no idea where to start. It can be a stressful experience. If you’ve ever had to analyze a data set, you know the anxiety. Deciding how and where to start exploring … Continue reading

Posted in Uncategorized | Tagged , , , , , , , , , , , | Leave a comment

35 Ways Data Go Bad

When you take your first statistics class, your professor will be a kind person who cares about your mental well-being. OK, maybe not, but what the professor won’t do is give you real-world data sets. The data may represent things … Continue reading

Posted in Uncategorized | Tagged , , , , , , , , , , , , , , | 1 Comment

The Most Important Statistical Assumptions

Image | Posted on | Tagged , , | 3 Comments