Feb 11
First: questions about anything, or anything you'd like to go over?
Second, we're going to continue as we did on Tuesday,
practicing with the material from chapter 1 :
- looking at data sets
- making graphs to understand that data
- finding the mean and standard deviation of parts of the data and interpreting what that means
We'll look at two more data sets built into R, "sleep" and "orange" :
dataset "sleep" :
columns are
extra extra hours of sleep (difference from control group)
group which of two drugs
id ten people
questions :
Which drug caused more sleep?
Does the difference look meaningful?
What is a plot that shows what's going on?
What are the interesting mean & standard deviations?
datset "Orange"
columns are
Tree five specific trees
age in years
circumference in mm, at chest height
questions :
What sorts of things can be learned from this data?
What would be reasonable things to take the mean or standard dev of?
what are interesting plots?
In small groups, take
- first explore the data, then
- come together as a class to share & discuss.
