273 search results for "Anova"

Linking apples liking to analytical data

April 2, 2012
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Linking apples liking to analytical data

This post describes the last puzzle piece of the model. The link of instrumental to sensory data. Together with the previous pieces this leads to a model starting from physico-chemical measurements, to sensory data, to consumers' perception and finally...

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Functional regression, INLA, and how to build the World’s Slowest Fourier Transform

March 29, 2012
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Functional regression, INLA, and how to build the World’s Slowest Fourier Transform

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R functions for serious stats

March 25, 2012
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R functions for serious stats

UPDATE: Some problems arose with my previous host so I have now updated the links here and elsewhere on the blog. The companion web site for Serious Stats has a zip file with R scripts for each chapter. This contains examples of R code and and all my functions from the book (and a few extras).

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Example 9.24: Changing the parameterization for categorical predictors

March 22, 2012
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Example 9.24: Changing the parameterization for categorical predictors

In our book, we discuss the important question of how to assign different parameterizations to categorical variables when fitting models (section 3.1.3). We show code in R for use in the lm() function, as follows:lm(y ~ x, contrasts=list(x,"contr.trea...

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R for Quants, Part II (A)

February 16, 2012
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R for Quants, Part II (A)

This is the second part in a three part series on teaching R to MFE students at CUNY Baruch. The …Continue reading »

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Beware the Friedman test!

February 14, 2012
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Beware the Friedman test!

In section 10.4.4 of Serious stats (Baguley, 2012) I discuss the rank transformation and suggest that it often makes sense to rank transform data prior to application of conventional ‘parametric’ least squares procedures such as t tests or one-way ANOVA. There are several advantages to this approach over the usual approach (which involves learning and applying a new test such as Mann-Whitney U,

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Confirming SSR, SSE, and SST using matrix in R

February 1, 2012
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Confirming SSR, SSE, and SST using matrix in R

The codes below was done in our regression laboratory class. Here, we run first the data in SPSS, and take the ANOVA output where we can find the computed values of SSR, SSE, and SST.ANOVAb Model Sum of Squares df Mean Square F Sig. 1 Regress...

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First impressions of Doing Bayesian Data Analysis

December 22, 2011
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First impressions of Doing Bayesian Data Analysis

About a month ago I was discussing the approach that I would like to see in introductory Bayesian statistics books. In that post I mentioned a PDF copy of Doing Bayesian Data Analysis by John K. Kruschke and that I … Continue reading →

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Blog Statistics with StatCounter & R

December 19, 2011
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Blog Statistics with StatCounter & R

If you're interested in analysing your blog's statistics this can easily be done with a web-service like StatCounter (free, only registration needed, quite extensive service) and with R.After implementing the StatCounter script in the html code of a we...

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Statistics with R – Lots of R Examples

December 8, 2011
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Statistics with R – Lots of R Examples

“Statistics with R” is a great R graphics & stats website. It provides lots of R examples, covering many analytics topics. It is also available as a PDF document to download at the website, as well as the R codes. … Continue reading →

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