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add Statistics-1-R.md #58

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add Statistics-1-R.md
brymz May 26, 2015
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Statistics-1-R.md: [Graphing - 1] -> [Graphing 1]
brymz Jun 15, 2015
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Merge branch 'gh-pages' of https://github.com/ethanwhite/datacarp-sem…
brymz Jun 15, 2015
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19 changes: 19 additions & 0 deletions exercises/Statistics-1-R.md
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---
layout: exercise
title: Statistics 1
language: R
---

This is a follow up to the [Graphing 1]({{ site.baseurl }}/exercises/graphing-1-R).

We've graphed the relationship between adult size and new born size in
mammals and now it's time to analyze the relationship statistically.

1. Do a regression where x is log10(adult mass) and y is log10(newborn mass)
2. Print the summary statistics for this regression
3. Make a graph that shows both the data points and the regression line through
those points. Label the axes.

*Optional: If you want, plot a histogram of the residuals of the regression to
make sure that they are roughly normally distributed (you can do this with just
a single line of code)*