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Source files for OpenIntro Statistics labs

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R 12.37% CSS 0.02% TeX 2.19% HTML 85.42%

oilabs-base-r's Introduction

OpenIntro Labs

OpenIntro Labs promote the understanding and application of statistics through applied data analysis. Labs are titled based on topic area, which correpond to particular chapters in all three versions of OpenIntro Statistics, a free and open-source textbook. The textbook as well as the html version of the labs can be found at http://www.openintro.org/stat/labs.php.

We currently support our source files in the .Rmd format, which can be output into html format (though output to pdf is also possible). The source files are processed using the knitr package in R. If you are using RStudio, be sure that you've adjusted your settings to compile source files using this package. If you are unfamiliar with working with these file types, you may consider creating your own copy of the Google Doc version of each lab, which are archived at http://www.openintro.org/stat/labs.php. These versions are not currently supported, so they will differ slightly from the .Rmd labs found here.

It is our hope that these materials are useful for instructors and students of statistics. If you end up developing some interesting variants of these labs or creating new ones, please let us know!

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oilabs-base-r's Issues

Link in Lab 4B points to outdated PDF of Lab 4A on OpenIntro site

Should this be changed to point to the GitHub file? Or will the OI site be updated with the new HTML version of Lab 4A?

Lab 3 Second Look (not Naomi)

Lab 0 conform style

Second look at Lab 7 (not Ben)

Second look at lab 8 (not Ben)

update labs with dplyr syntax

Is this planned? I'm happy to help out.

Update hot hands reference in probability lab

http://andrewgelman.com/2015/07/09/hey-guess-what-there-really-is-a-hot-hand/#comments

Lab 7 conform style

vague wording in Lab 0

Lab 0 asks:

How do the counts of boys and girls in the present day birth records compare to Arbuthnot's? Are they on a similar scale?

The "similar scale" wording is vague and confusing for students. Would "same order of magnitude" be clearer or even more confusing? Is there a more precise way to ask the question?

Dns redirection problem for lab data

download.file("http://www.openintro.org/stat/data/bdims.RData", destfile = "bdims.RData")

downloaded 0 bytes

Error in download.file("http://www.openintro.org/stat/data/bdims.RData", :
cannot download all files
In addition: Warning message:
In download.file("http://www.openintro.org/stat/data/bdims.RData", :
URL 'http://www.openintro.%20net/stat/data/bdims.RData': status was 'Couldn't resolve host name'

qqnormsim() not sourced?

qqnormsim() is great! But looking at the html version of Exercise 3 doesn't make it clear how to define the function. Perhaps either include a source() command or put it in a CRAN package and use ::?

inf_for_categorical_data line 28

Hello,

Seems like resource Global_INDEX_of_Religiosity_and_Atheism_PR__6.pdf is NOT reachable.

Lab 6 Second Look (not Andrew)

Phillies have 5579 at bats

Exercise 5 asks

If a team manager saw the least squares regression line and not the actual data, how many runs would he or she predict for a team with 5,578 at-bats? Is this an overestimate or an underestimate, and by how much? In other words, what is the residual for this prediction?

But, there is no answer, as no team has 5578 at bats. I don't know if the data set changed or what happened, but Philadelphia is closest with just one more.

Lab 1 Second Look (not Naomi)

Add bolded OYO numbers to lab.css

Lab 5 conform style and clean dir

Lab 2 Second Look (not Naomi)

Weirdness with lists in Model Diagnostics section of Lab 7

I wasn't sure how to get the lists to look right.

new questions or data set in "intro to data" lab

Could we replace the body weight data set from the Intro to Data lab with something else? Or at least change the questions? As it stands, it strikes me as one of those surreptitious things that makes women feel bad about their bodies for no reason.

Incongruous description of loops in Lab 4B

In Lab 4B, you describe the process of creating many confidence intervals as:

Obtain a random sample.
Calculate the sample's mean and standard deviation.
Use these statistics to calculate a confidence interval.
Repeat steps (1)-(3) 50 times.

But in the actual simulation, you do steps 1 and 2, then step 4, and then do step 3 for all the intervals at once. So the description of the process conflicts with the code that implements the process. This is confusing.

Why not provide access to full data on NC births?

Your lab begins

In 2004, the state of North Carolina released a large data set containing
information on births recorded in this state. This data set is useful to
researchers studying the relation between habits and practices of expectant
mothers and the birth of their children. We will work with a random sample of
observations from this data set.

Even if you primarily work with this random sample in your lap, it seems like you could tell people how/where to get the entire data set.