Why Your Quintiles are not 20%

Today’s post courtesy of Captain Obvious … To do quintile matching, one must first match by quintiles. Hence, the name. Quintiles divide your data set into five equal, um, fifths. Quint is Latin (or Greek

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Today’s post courtesy of Captain Obvious … To do quintile matching, one must first match by quintiles. Hence, the name. Quintiles divide your data set into five equal, um, fifths. Quint is Latin (or Greek

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Why I Madly Love Dreamweaver Today

The Rocket Scientist is opposed to buying software that has licenses activated, on general principle and because we usually have at least six computers between the two of us – a desktop Mac each which

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The Rocket Scientist is opposed to buying software that has licenses activated, on general principle and because we usually have at least six computers between the two of us – a desktop Mac each which

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Predictor variables – when order does and does not matter

Having failed recently to use BMI as a variable from a data set on school children in our example for propensity score matching, because people who fill out surveys are big, fat liars, we next

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Having failed recently to use BMI as a variable from a data set on school children in our example for propensity score matching, because people who fill out surveys are big, fat liars, we next

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Packing 2012 Style

I’m taking off for two weeks on a working vacation defined as I will be working while the rest of the family is on vacation. I found it interesting that the list of what I

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I’m taking off for two weeks on a working vacation defined as I will be working while the rest of the family is on vacation. I found it interesting that the list of what I

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Survey Participants are Fat Liars

We are looking for data to use as an example of propensity score matching for a couple of upcoming workshop / classes. Since the data I have used previously belonged to other people, I needed

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We are looking for data to use as an example of propensity score matching for a couple of upcoming workshop / classes. Since the data I have used previously belonged to other people, I needed

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Buy All the Help You Can Afford

Oddly, Sandra Scarr, author of both the seminal study on IQs of black children adopted into white homes and the book on child care, “Mother care/other care” gave this advice to working mothers. I quoted

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Oddly, Sandra Scarr, author of both the seminal study on IQs of black children adopted into white homes and the book on child care, “Mother care/other care” gave this advice to working mothers. I quoted

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Subtle Racism is the Harder Kind

Years ago,  I happened to be at a meeting where two well-known African-American researchers were speaking. Like many conferences, there were “round table” luncheons with the famous people that you could attend. I forgot what

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Years ago,  I happened to be at a meeting where two well-known African-American researchers were speaking. Like many conferences, there were “round table” luncheons with the famous people that you could attend. I forgot what

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I have no trouble finding Latino staff members: Proof there isn’t a level playing field

When I send bills to clients, I often, both for their information and mine, include the initials for the staff members being charged to that project. Of course, people are charged at different rates and

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When I send bills to clients, I often, both for their information and mine, include the initials for the staff members being charged to that project. Of course, people are charged at different rates and

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Blog envy and article envy

I learned at St. Mary’s Catholic School that envy was a sin. Good thing I am going to mass on Thursday, because I am suffering from a good deal of envy lately. First there is

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I learned at St. Mary’s Catholic School that envy was a sin. Good thing I am going to mass on Thursday, because I am suffering from a good deal of envy lately. First there is

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This was not what I wanted to do today

I thought it would be really interesting today to get back to looking at SAS Enterprise Miner, especially the text mining.  I thought it would be cool to take another look at Statistica. I also

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I thought it would be really interesting today to get back to looking at SAS Enterprise Miner, especially the text mining.  I thought it would be cool to take another look at Statistica. I also

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