
Recent Posts
Archives
 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
Stats with Cats on Facebook
Recent Posts from: Random TerraBytes
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.About pictures
I decided to start using other peoples' pictures of cats for my blogs for a variety of reasons. It's hard enough for me to get a good picture of my cats let alone one that might go with what I'm writing. I also thought it would improve my blogs by having a much greater variety of images to choose from. I understand enough about creativity and art and photography to know they are both a talent and a skill that should be recognized. I want to give proper attribution to the creators of the images I use in my blogs, but there is a problem. Virtually every image I want to use appears in more than one place on the Internet. I thought using tineye.com, a search site for finding URLs of uploaded images, would help. In fact, I found the opposite. Some of the images I've searched for are found on a hundred different sites, making it impossible to identify the original. So, if I can't identify the original, I'll cite the site I got the image from or if it's an image I don't have a URL for, I'll cite the site that tineye.com indicates has the image that most closely matches the image I use. If I use an image that you created and I didn’t give you credit, I'm sorry. Let me know and I’ll fix the citation or remove the image.Meta
Tag Archives: sample size
Dare to Compare – Part 2
Part 1 of Dare to Compare summarized several fundamental topics about statistical comparisons. Statistical comparisons, or statistical tests as they are usually called, involve populations, groups of individuals or items having some fundamental commonalities. The members of a population also … Continue reading
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, Nonlinear 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
4 Comments
Polls Apart
Election season is fast approaching so you can be sure a plethora of polls will soon be adding to the mayhem. Polls educate us in two ways. They tell us what we, or at least the population being polled, think. … Continue reading
Posted in Uncategorized
Tagged bias, cats, margin of error, number of samples, politics, polls, population, sample size, samples, statistics, stats with cats, surveys
2 Comments
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
9 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
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, Rsquare, sample size, shrunken correlation, software, statistical analysis, statistical tests, statistics, stats with cats, trend, variance
36 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