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License: Other
Source files for OpenIntro Statistics labs
License: Other
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.
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.
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.
I wasn't sure how to get the lists to look right.
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 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?
Hello,
Seems like resource Global_INDEX_of_Religiosity_and_Atheism_PR__6.pdf is NOT reachable.
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 ::
?
Is this planned? I'm happy to help out.
In Lab 4B, you describe the process of creating many confidence intervals as:
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.
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'
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