Assignment for Class 13
(Note that we’ve skipped “Class 12” in our numbering–I postponed it until later in the semester.)
Please complete before the next class.
Make sure that you’ve completed all previous HW first.
Link
Four Scatterplots
FPP
Read chs. 7 and 8 of FPP and do the assigned review exercises here.
Make sure that if I give you several sets of paired observations, such as X = [1, 2, 3, 4, 5] and Y = [1, 3, 2, 4, 6], you can calculate and interpret the correlation coefficient. You can test yourself by logging in to your Google account and then copying this Google Sheet. Also, make sure you can roughly link a particular scatterplots with it’s correlation coefficient (see Exercise 9.1 in the notes below).
To see the process I recommend, watch this video. (There’s also a low-quality version if speed becomes an issue.) In this video, I walk through how to calculate a correlation coefficient. There will be an exam question that asks you to do this entire process. (Other questions will ask about parts of the process.)
Notes
Read chs. 7, 8, and 9 from my notes. There’s substantial overlap with chs. 7 and 8 from FPP, so you may be able to skim some of the content. Make sure that you can draw a scatterplot in R (see Exercise 8.1), compute a correlation coefficient in R (see Exercises 9.4 and 9.5)
Carlisle Rainey