# 1209 search results for "latex"

## Why bother with magrittr

October 31, 2015
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$Why bother with magrittr$

I’ve seen R users swooning over the magrittr package for a while now, but I couldn’t make heads or tails of all these scary %>% symbols. Finally I had time for a closer look, and it seems potentially handy indeed. … Continue reading →

## Piecewise linear trends

October 27, 2015
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I prepared the following notes for a consulting client, and I thought they might be of interest to some other people too. Let denote the value of the time series at time , and suppose we wish to fit a trend with correlated errors of the form     where represents the possibly nonlinear trend

## Installing R on OS X – “100% Homebrew Edition”

October 22, 2015
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In a previous post I provided “mouse-heavy” instructions for getting R running on your Mac. A few of the comments suggested that an “all Homebrew” solution may be preferable for some folks. Now, there are issues with this since getting “support” for what may be R issues will be very difficult on the official mailing

## Applied Statistical Theory: Belief Networks

October 21, 2015
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$Applied Statistical Theory: Belief Networks$

Applied statistical theory is a new series that will cover the basic methodology and framework behind various statistical procedures. As analysts, we need to know enough about what we’re doing to be dangerous and explain approaches to others. It’s not enough to say “I used X because the misclassification rate was low.” At the same

## Installing R on OS X

October 20, 2015
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I was in a conversation with an academic colleague (wicked smart dude) and the subject of installing R came up (NOTE: this will happen to you, too, if you ever have the misfortune to have a face-to-face convo with me ;-). They noted that getting up and running with R was not as seamless as

## Statistical Tests: Asymptotic, Exact, ou based on Simulations?

October 20, 2015
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$\boldsymbol{x}=\{x_1,\cdots,x_n\}$

This morning, in our mathematical statistics course, we’ve been discussing the ‘proportion test‘, i.e. given a sample of Bernoulli trials, with , we want to test against  A natural test (which can be related to the maximum likelihood ratio test) is  based on the statistic The test function is here To get the bounds of the acceptance region, we need the...

## Tests, Power and Significance

October 14, 2015
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$\boldsymbol{x}=\{x_1,\cdots,x_n\}$

In the mathematical statistics course today, we started talking about tests, and decision rules. To illustrate all the concepts introduced today, we considered the case where we have a sample  with . And we want to test   against  In the course, we’ve seen that we could use a test based on the order statistics .  The test would be i.e. if  we...

## Recommendations for First Year Graduate Students

October 12, 2015
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This blog post is a little late; I wanted to get it out sooner. As new students have flooded the halls for the new terms at JHU Biostat, I figured I would give some recommendations to our new students, and biostatistics students in general. Some of these things may be specific to our department, but

## Recommendations for First Year Graduate Students

October 12, 2015
By

This blog post is a little late; I wanted to get it out sooner. As new students have flooded the halls for the new terms at JHU Biostat, I figured I would give some recommendations to our new students, and biostatistics students in general. Some of these things may be specific to our department, but

## Recruiting Analysts for dynamic cutting edge public sector team

October 3, 2015
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The jobs Within the New Zealand Ministry of Business, Innovation and Employment, the Sector Trends team has recently secured resourcing for additional analysts on a range of statistical programmes. That’s the team that I usually manage, although for the next few months I’m doing a stint on a similar team, different topics. The formal details and position descriptions...