Begin by answering the questions, even if you have to guess. The first
time you answer the questions you will not be told whether you are correct
or not.
Once you have answered all the questions, answer them again using the
simulation to help you. This time you will get feedback about each individual
answer.

Learning Objectives
 State the effect of including only the upper half of the data on
r
 State the effect of excluding the middle half of the data on r
 State the effect of excluding the upper quartile and the lower quartile
on r
