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Is it sick to get this excited about data analysis?

The results are in! The chart below gladdens my little heart, somewhat. One thing to note is the fact that the 95% confidence interval is comfortably above zero. Another point is that it looks like a pretty normal distribution. What is it? It is the difference between pretest and post-test scores for 71 students at…

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SAS Tip: Preventing Disaster When Variable Lengths Differ

Over the weekend, I wrote a post showing how SAS can be used to make what appears to be a complex problem quite simple. First of all, am I just being dramatic? Seriously, how can having your variable lengths differ be a disaster? Simple. You are merging by a variable that is a unique user…

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Messy Problems Made Simple with SAS

Some problems¬†that seem really complex¬†are quite simple when you look at them in the right way. Take this one, for example: My hypothesis is that a major problem in math achievement is persistence. Students just give up at the first sign of trouble. I have three different data sets with student data from the Spirit…