I’ve written here before about visual literacy and Cook’s D is just my latest example. Most people intuitively understand that any sample can have outliers, say, an 80-year-old man who is the father of a six-year-old child, the new college graduate who is making $150,000 a year. We understand that those people may throw off…
Ever wonder why with goodness of fit tests non- significance is what you want? Why is that sometimes when you have a significant p-value it means your hypothesis is correct, there is a relationship between the price of honey and the number of bees, and in other cases, significance means your model is rejected? Well,…
I’ve been looking high and low for a supplemental text for a course on multivariate statistics and I found this one – The Multivariate Social Scientist, by Graeme Hutcheson 7 Nick Sofroniou They are big proponents of generalized linear models, in fact, the subtitle is “Introductory statistics using generalized linear models”, so if you don’t…
You might have gotten the misimpression from my previous post that I don’t think students need to learn all that much matrix algebra that I am a slacker as far as expecting students to come to courses with some prior knowledge. That’s not exactly the case. In fact, here are some things I just assume…
Following a discussion using matrix algebra to show computation in a Multivariate Analysis of Variance, a doctoral student asked me, “Professor, when will I ever use this? Why do I need to know this?” He had a valid point. I’m always asking myself why I’m teaching something. Is it because it interests me personally, because…
Today, I was thinking about using data from the National Hospital Discharge Survey to try to predict type of hospital admission. Is it true that some people use the emergency room as their primary method of care? Mostly, I wanted to poke around wit the NHDS data and get to know it better for possible…
I was talking to a friend of mine today who had taken a test for a new job recently and he had a hard time with the math portion of it. We were in college about the same time and he did perfectly fine in math, but it had been a while. This got me…
When I was running out to the airport, I said I would explain how to get a single plot of all of your scatter plots with SAS. Let’s see if I can get this posted before the plane lands. Not likely but you never know … It’s super simple proc sgscatter data=sashelp.heart ; matrix ageatdeath…
My life is upside down. All day, as my job, I spent writing a program to get a little man to run around a maze, come out the other end and have a new screen come up with a math challenge question. Then, in the evening, I’m surfing the web for interesting bits to read…
I’m pretty certain I did not deliberately hide these folders. When I opened up my new and improved SAS Studio, it had tasks but my programs were missing. If this happens to you and you are full of sadness missing your programs, look to the top right of your screen where you see some horizontal…