Transcript ppt

Section 1.2
Part 3
AP Statistics
CASA
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
2
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
3
Back-To-Back Stemplots
AP Statistics, Section 1.2, Part 3
4
Back-To-Back Stemplots
AP Statistics, Section 1.2, Part 3
5
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
6
Assignment
Exercises 1.48 – 1.58, The Practice of
Statistics, for tomorrow.
 Exercises 1.61-1.73 odd.
 Test Chapter 1, Wednesday

AP Statistics, Section 1.2, Part 3
7