Ever since my daughters referred to the day in April when we all take our kids to the office as “Bore your daughters at work day”, it has been clear to me that others do not find me as interesting as I find myself. Based on this profound knowledge, when I was asked to talk…
I was planning to finish off with the single most important thing I have learned in 55 years, but life has a way of running away with me. Between meeting with an after-school program that will be using our game next month, a meet-up in San Jose, getting our update 2.10 ready to go, writing…
Not sure what the average number of people to have bailed out of jail is, nor the average number of countries from which people have called you for said bail money, but I’m pretty certain that I have exceeded both of those averages. As I explained to my niece, Samantha, the other day, when people…
Contrary to appearances, I’m a fairly private person. You might not think so from some of what I write on this blog, but I challenge anyone to read through here and find personal details like the number of my siblings who have passed away or something hurtful someone might have done to me. Since I’m…
Despite what you might think from reading this blog, there is an awful lot about my feelings that I keep to myself, which leads me to #51 of 55 things I have learned in (almost) 55 years – No one really cares about your feelings all that much. Maybe your parents do. Perhaps your boyfriend/ girlfriend…
This is the third and last part of my attempt to explain logistic regression in pictures. You can see a picture of odds ratios here, and a picture of two charts of predicted probabilities, to compare models, here. If people only know one chart associated with logistic regression, it is usually the ROC chart, though…
I tweeted that I believed one could explain logistic regression results in three or four charts, and Alberta Soranzo tweeted back, “Try me.” Challenge accepted. These data are taken from the Kaiser-Permanente study of the Oldest Old, a sample of 5,986 people who were aged 65-95 when recruited into the study. Participants were followed for…
One nice thing that SAS Enterprise Guide does is produce a series of graphs when you do a logistic regression. Too many people just skim over the table of Type III effects, say what is significant and isn’t and go on their merry way, which is too bad, because sometimes your graphs are very easy…
A two-by-two table is a very common design. The column variable is some type of treatment or intervention. For example, older (over 65 years of age) people who either lived in a nursing home or who did not. Your row variable is some categorical outcome. For example, they either lived or died. You create a…
My long and occasionally-storied career began as an industrial engineer, where I had drilled into my brain one of my most useful life lessons. Here is the secret to mastering your life, reducing your stress by a good 50% — Learn the difference between standard hours and actual hours The business dictionary laughably defines a standard…