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Tag Archives: standardization
Regression Fantasies
Common Reasons for Doubting a Regression Model Finding a model that fits a set of data is one of the most common goals in data analysis. Least squares regression is the most commonly used tool for achieving this goal. It’s … Continue reading
Posted in Uncategorized
Tagged accuracy, autocorrelation, correlation coefficient, dependent variable, heteroscedasticity, intercept, misspecification, model, multicollinearity, Non-linear relationships, number of samples, outliers, overfitting, precision, regression, sample size, samples, software, standardization, statistical analysis, statistical tests, statistics, stats with cats, stepwise regression, trend, variability, variance
13 Comments
It’s All Relative
It’s easy to quote someone out of context to impart a false impression. A movie critic might write a review saying, “This film is a delight compared to a colonoscopy” only to be quoted as saying, “This film is a … Continue reading
Posted in Uncategorized
Tagged cats, frankendata, measurement, politics, population, samples, standardization, statistical analysis, statistical index, statistics, stats with cats
10 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
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
42 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
The Heart and Soul of Variance Control
You can’t understand data without controlling the variance. You can’t control variance without understanding the data. Variance Doesn’t Go Away By Ignoring It In an ideal universe, your dataset would contain no bias and only the natural variability you want … Continue reading
Posted in Uncategorized
Tagged bias, cats, precision, randomization, replication, standardization, statistical analysis, statistics, stats with cats, surveys, uncertainty, variability, variance
11 Comments
Time Is On My Side
If you do much data analysis it won’t be long before you work with data measured over a range of times. When you do see time-series data, you’ll find that time scales and time units have some very quirky properties. … Continue reading
Posted in Uncategorized
Tagged cats, jargon, math, resolution, software, standardization, statistical analysis, statistics, stats with cats, time
13 Comments
Samples and Potato Chips
Samples are like potato chips. You’re never satisfied with just one. Every one you take makes you want more. And you’re never sure you’ve had enough until you’ve had way too many. Betcha Can’t Take Just One One observation. … Continue reading
It’s All Greek
When Humpty Dumpty uses a word, it means just what he chooses it to mean, neither more nor less. To people not conversant in a technical specialty, it seems that all the experts are Humpty Dumptys. Statistics is no exception. … Continue reading
Posted in Uncategorized
Tagged cats, information, jargon, journal, math, mean, Normal distribution, probability, standardization, statistical analysis, statistical tests, statistics, stats with cats, uncertainty
10 Comments
Stats With Cats Blog 