Chi-square, by request, and not in a few words

Recently, someone asked me if I could explain chi-square in a few words. The short answer is, “No, I am incapable of using only a few words for any purpose whatsoever. If you doubt this,

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Recently, someone asked me if I could explain chi-square in a few words. The short answer is, “No, I am incapable of using only a few words for any purpose whatsoever. If you doubt this,

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All the little models come home to nest

Categorical data analysis used to be simple. You had two nominal variables and you did a chi-square analysis. If it was statistically significant, that was all it took to make life good. Then, logistic regression

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Categorical data analysis used to be simple. You had two nominal variables and you did a chi-square analysis. If it was statistically significant, that was all it took to make life good. Then, logistic regression

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Satterthwaite, variances, walruses and uteruses

Statistics applies to everything. Today I was looking up examples of the Satterthwaite alternative to the pooled variance t-test. In short, a t-test is used when one wants to answer the question, “Is the difference

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Statistics applies to everything. Today I was looking up examples of the Satterthwaite alternative to the pooled variance t-test. In short, a t-test is used when one wants to answer the question, “Is the difference

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Finding Groups in Data

Today, Dr. De Mars is — happy. One of the fun things about my job is that I get to do lots of different things. That can be a bit troubling some days, because statistical

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Today, Dr. De Mars is — happy. One of the fun things about my job is that I get to do lots of different things. That can be a bit troubling some days, because statistical

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SPSS: Does not play well with others

SPSS does some pretty cool things, and I have written about some of them here. However, there are also some annoyances. First of all, it is one of the hardest packages to use moving datasets

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SPSS does some pretty cool things, and I have written about some of them here. However, there are also some annoyances. First of all, it is one of the hardest packages to use moving datasets

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Signs of Intelligent Internet Life

Regularly, I search the Internet (well, not all of it) for signs of intelligent life. Most of what I find, sadly, falls into the category of blogs-on-what-I-ate-for-lunch. Every now and then, I get lucky. For

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Regularly, I search the Internet (well, not all of it) for signs of intelligent life. Most of what I find, sadly, falls into the category of blogs-on-what-I-ate-for-lunch. Every now and then, I get lucky. For

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SPSS – Four Cool Things

If you haven’t checked out the site 43thing.coms website, you really should. You can post up to 43 things that you want to do and then add updates as you make progress on your things.

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If you haven’t checked out the site 43thing.coms website, you really should. You can post up to 43 things that you want to do and then add updates as you make progress on your things.

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The Dangers and Wonders of Statistics Using SAS :

Over the past twenty-five years, due to improvements in statistical software capabilities, it has become increasingly easier to obtain output for complex statistical procedures. Unfortunately, this does not mean that statistical analysis has become easier.

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Over the past twenty-five years, due to improvements in statistical software capabilities, it has become increasingly easier to obtain output for complex statistical procedures. Unfortunately, this does not mean that statistical analysis has become easier.

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Mistakes with SAS Today

Every now and then I post a mistake I made using either statistical software or statistics. Students often get discouraged feeling they make so many mistakes and they will never get it all right. No

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Every now and then I post a mistake I made using either statistical software or statistics. Students often get discouraged feeling they make so many mistakes and they will never get it all right. No

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There’s no place like home

I have been asked several times by students in my classes if I would consider writing a blog on statistics and statistical programming. Apparently, blogs are “in” with people younger than me, as witness daughter

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I have been asked several times by students in my classes if I would consider writing a blog on statistics and statistical programming. Apparently, blogs are “in” with people younger than me, as witness daughter

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