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Tag Archives: cats
Secrets of Good Correlations
If you’ve ever seen a correlation coefficient, you’ve probably looked at the number and wondered, is that good? Is a correlation of -0.73 good but not a correlation of +0.58? Just what is a good correlation and what makes a … Continue reading
Posted in Uncategorized
Tagged cats, coefficient of determination, correlation coefficient, measurement scales, multiple correlation, number of samples, objectives, outliers, partial correlation, R-square, sample size, shrunken correlation, software, statistical analysis, statistical tests, statistics, stats with cats, trend, variance
36 Comments
Fifty Ways to Fix your Data
Fifty Ways to Fix your Data (Sing to the tune of “Fifty Ways to Leave Your Lover” by Paul Simon) The problem is all about your scales, she said to me The R-squares will be better if you’ve matched ’em … Continue reading
Posted in Uncategorized
Tagged Box-Cox, cats, correlation coefficient, differencing, information, lags, math, measurement, measurement scales, model, Normal distribution, recoding, rescaling, smoothing, software, standardization, statistical analysis, statistics, stats with cats, transformations, trend
31 Comments
You Can Lead a Boss to Data but You Can’t Make Him Think
The most carefully planned data analysis may not survive the intervention of a boss (or a client or other reviewer), whether well intentioned or not. Your aim may be to generate sound data and conduct a thorough and valid analysis, … Continue reading
Posted in Uncategorized
Tagged boss, cats, client, objectives, politics, population, sample size, samples, statistical analysis, statistics, stats with cats, surveys, uncertainty
3 Comments
Ten Fatal Flaws in Data Analysis
1. Where’s the Beef? In a way, the worst flaw a data analysis can have is no analysis at all. Instead, you get data lists, sorts and queries, and maybe some simple descriptive statistics but nothing that addresses objectives, answers … Continue reading
Posted in Uncategorized
Tagged cats, extrapolation, information, meaningfulness, measurement scales, model, number of samples, polls, population, precision, resolution, sample size, samples, significance, standardization, statistical analysis, statistical tests, statistics, stats with cats, surveys, uncertainty, variability, variance
43 Comments
Resurrecting the Unplanned
Even if you took a class in statistics or another form of data analysis, you probably didn’t hear about frankendata. Frankendata is created when data, collected by different people, at different times and locations, analyzed with different procedures and equipment, … Continue reading
Posted in Uncategorized
Tagged cats, frankendata, population, samples, standardization, statistical analysis, statistics, stats with cats
3 Comments
Tales of the Unprojected
We have a habit in writing articles published in scientific journals to make the work as finished as possible, to cover up all the tracks, to not worry about the blind alleys or describe how you had the wrong idea … Continue reading
Posted in Uncategorized
Tagged bias, cats, client, communications, objectives, politics, polls, project management, relationships, reviewer, statistical analysis, statistics, stats with cats, surveys
4 Comments
The Data Scrub
Garbage in, garbage out is a saying that dates back to the early days of computers but is still true today, perhaps even more so. If the numbers you use in a statistical analysis are incorrect (garbage), so too will … Continue reading
Posted in Uncategorized
Tagged cats, data scrubbing, statistical analysis, statistics, stats with cats, validation, verification
15 Comments
Perspectives on Objectives
Conducting a statistical analysis can be like traveling to a foreign country that you’ve never been to before. You had better have a map and some idea of what you want to do there or you might end up wasting … Continue reading
Posted in Uncategorized
Tagged cats, goals, objectives, proposals, regulations, SAS, statistical analysis, statistics, stats with cats
5 Comments
Assuming the Worst
If you’re going to be poking around data looking for patterns and anomalies, you should be aware of the fundamental requirements you need to fulfill, or at least assume you fulfill. Consider this. All models make assumptions, an evil necessity … Continue reading
It was Professor Plot in the Diagram with a Graph
You probably were taught how to graph data in high school. Depending on your work, you may frequently plot data yourself or look at graphs prepared by others. Even if you don’t use graphs on your job, you may run … Continue reading
Posted in Uncategorized
Tagged axis, cats, charts, diagrams, graphs, jargon, McCandless, measurement scales, number of samples, plots, statistical analysis, statistics, stats with cats, Tufte
12 Comments
Stats With Cats Blog 