DISCLAIMER
The postings on this blog are my own (except as noted) and do not necessarily represent the positions, strategies or opinions of my current, past, and future employers, cats and other family members, relatives, Facebook friends, real friends, Charlie Sheen, people who sit next to me on public transportation, or myself when I’m in my right mind.
Recent Posts
Archives
 February 2022
 November 2020
 October 2020
 September 2020
 August 2020
 July 2020
 May 2020
 January 2019
 December 2018
 October 2018
 September 2018
 November 2017
 September 2017
 May 2017
 February 2017
 January 2017
 December 2016
 September 2016
 August 2016
 July 2016
 June 2016
 January 2016
 July 2015
 February 2015
 January 2015
 December 2014
 November 2014
 October 2014
 January 2014
 September 2013
 May 2013
 April 2013
 February 2013
 August 2012
 July 2012
 June 2012
 February 2012
 May 2011
 April 2011
 March 2011
 February 2011
 January 2011
 December 2010
 November 2010
 October 2010
 September 2010
 August 2010
 July 2010
 June 2010
 May 2010
RSS Links
Feedburner

Blogroll
Recent Posts from: Random TerraBytes
Meta
Tag Archives: uncertainty
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
Ten Tactics used in the War on Error
Scientists and other theorydriven data analysts focus on eliminating bias and maximizing accuracy so they can find trends and patterns in their data. That’s necessary for any type of data analysis. For statisticians, though, the real enemy in the battle … Continue reading
Six Misconceptions about Statistics You May Get From Stats 101
When you learn new things, you can develop misconceptions. Maybe it’s the result of something you didn’t understand correctly. Maybe it’s the way the instructor explains something. Or maybe, it’s something unspoken, something you assume or infer from what was … Continue reading
Posted in Uncategorized
Tagged cats, data scrubbing, math, measurement, number of samples, polls, population, resolution, sample size, samples, statistical analysis, statistics, stats with cats, surveys, uncertainty, variability, variance
10 Comments
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
Limits of Confusion
A confidence interval is the numerical interval around the mean of a sample from a population that has a certain confidence of including the mean of the entire population. “Say what?” OK, let’s take it one point at a time. … Continue reading
Posted in Uncategorized
Tagged cats, jargon, number of samples, precision, statistics, stats with cats, t distribution, uncertainty, variability, variance
8 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
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
42 Comments
It’s All in the Technique
You can’t understand your data unless you control extraneous variance attributable to the way you select samples, the way you measure variable values, and any influences of the environment in which you are working. Using the concepts of reference, replication … Continue reading
Posted in Uncategorized
Tagged bias, blinding, cats, control sample, covariate, jargon, measurement, placebo, precision, samples, SOP, statistical analysis, statistics, stats with cats, uncertainty, variability, variance, variance control
11 Comments