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Tag Archives: probability
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
PROBABILITY IS SIMPLE … KINDA
Language isn’t very precise in dealing with uncertainty. Probably is more certain than possibly, but who knows where dollarstodoughnuts falls on the spectrum. Statistics needs to deal with uncertainty more quantitatively. That’s where probability comes in. For the most part, … Continue reading
Five Things You Should Know Before Taking Statistics 101
Of the over two million college degrees that are granted in the U.S. every year, including those earned at accredited online colleges nationwide, probably twothirds require completion of a statistics class. That’s over a million and a half students taking … Continue reading
Consumer Guide to Statistics 101
Whether you took or are taking an introductory course on statistics, you probably didn’t get to choose from a dozen candidate offerings. You had to take the specific course required for your major. You can, though, evaluate what you got. … Continue reading
Posted in Uncategorized
Tagged cats, objectives, population, probability, SAS, SPSS, statistical analysis, statistical thinking, statistics, Stats 101, stats with cats, uncertainty
7 Comments
Grasping at Flaws
Even if you’re not a statistician, you may one day find yourself in the position of reviewing a statistical analysis that was done by someone else. It may be an associate, someone who works for you, or even a competitor. … Continue reading
Posted in Uncategorized
Tagged cats, correlation coefficient, criticism, dependent variable, jargon, math, mean, Normal distribution, number of samples, objectives, population, precision, probability, rule of thumb, sample size, samples, software, statistical analysis, statistical tests, statistics, stats with cats, uncertainty, variability
8 Comments
You’re Off to Be a Wizard
The process of developing a statistical model (https://statswithcats.wordpress.com/2010/12/04/manypathsleadtomodels/) involves finding the mathematical equation of a line, curve, or other pattern that faithfully represents the data with the least amount of error (i.e., variability). Variability and pattern are the yin and … Continue reading
Posted in Uncategorized
Tagged AIC, BIC, cats, coeffiient of determination, Cook’s Distance, dependent variable, DFBETAs, Ftest, jargon, model, multicollinearity, Normal distribution, probability, regression coefficients, residuals, standard error of estimate, statistical analysis, statistical leverage, statistical tests, statistics, stats with cats, ttest, trend, uncertainty, variability, variance inflation factor
8 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
The Zen of Modeling
What’s the first thing you think of when you hear the word model? The plastic model airplanes you used to build? A fashion model? The model of the car you drive? The person who is your role model? But what … Continue reading
Posted in Uncategorized
Tagged cats, drivers, jargon, math, model, modeling, Normal distribution, population, probability, statistical analysis, statistics, stats with cats, t distribution, uncertainty, workload
16 Comments
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
Try This At Home
We are all awash in statistics. Every day, we see the probability of precipitation, the results of opinion polls, changes in the stock market, your grades in school, or the batting average of the baseball team you follow. It’s surprising, … Continue reading
Posted in Uncategorized
Tagged cats, cell phone, hobby, information, journal, politics, probability, software, statistical analysis, statistics, stats with cats, trend, tv
4 Comments