by Craig Marker | Feb 5, 2007 | Uncategorized
If I were to wager that at least two people in my classes do not share a common birthday, I would ‘almost surely’ be wrong. In my class of 28 students, there is about a 70% chance of two people sharing the same birthday. Let’s say I am to ask everyone their birthday....
by Craig Marker | Feb 2, 2007 | Uncategorized
Millions Of Americans Travel To Kentucky To Attend Barbaro’s FuneralLOUISVILLE, KY—In a stirring show of love and respect, millions of people—including Barbaro’s owners, breeders, associates, foreign dignitaries and heads of state from over 90 countries,...
by Craig Marker | Feb 1, 2007 | Uncategorized
Here is syntax to calculate Cohen’s d in SPSS. The final table provides a t-statistic, associated p-value and Cohen’s d.**Assuming two variables in the SPSS data file labeled.** IV – Independent variable (Groups 1 & 2);.** DV – Dependent...
by Craig Marker | Jan 31, 2007 | Uncategorized
The Social Science Statistics Blog has an interesting entry today on heterogeneity in observational studies. Below is an excerpt:”Imagine you are asked to conduct an observational study to estimate the effect of wearing a helmet on the risk of death in...
by Craig Marker | Jan 29, 2007 | Uncategorized
Here is an old silent movie describing Type I and Type II errors.
by Craig Marker | Jan 25, 2007 | Uncategorized
Scientific American: Fact or Fiction?: Premium Gasoline Delivers Premium Benefits to Your CarExploding the myth that premium gasoline delivers better performance in the average automobile
