1. Section 1.2 Part 3
AP Statistics
CASA

2. Comparing Distributions
We have already seen the usefulness of comparing two distribution in the answering difficult questions like:
“Who was a better home run hitter, Barry Bonds or Hank Aaron?”
We used side-by-side boxplots to answer that question.
AP Statistics, Section 1.2, Part 3

3. Back-to-Back Stemplots
We can use stemplots as a way of doing comparisons between two distributions.
For example, which baseball league is more competitive, the American League or the National League?
AP Statistics, Section 1.2, Part 3

4. Back-To-Back Stemplots
AP Statistics, Section 1.2, Part 3

5. Back-To-Back Stemplots
AP Statistics, Section 1.2, Part 3

6. AP Statistics, Section 1.2, Part 3
Reminders
If there are outliers, don’t use mean or standard deviation to compare distributions.
You can’t compare a standard deviation of one distribution to the IQR of a different distribution.
You can’t compare a mean of one distribution to the median of a different distribution.
AP Statistics, Section 1.2, Part 3

7. AP Statistics, Section 1.2, Part 3
Assignment
Exercises 1.48 – 1.58, The Practice of Statistics, for tomorrow.
Exercises odd.
Test Chapter 1, Wednesday
AP Statistics, Section 1.2, Part 3