After completing this lesson, you should be able to learn the following:
8. INFERENCE FOR TWO-WAY TABLES
9.1 Inference for two-way tables
Two by two tables
Comparing many proportions
Analysis of general r by c tables.
Usage of Pearson x-squared statistic.
Reading Assignment
Read chapter 9 in Introduction to the Practice of
Statistics.
Activities
Key Terms
Chapter 9
Observed counts
Expected counts
Pearson's X-squared Statistic
Chi-Square distribution
Contributions to the X-squared statistic.
Chapter 9: Study Questions
Can the value of Pearson's X-squared statistic ever be negative?
If Pearson's X-squared is big, is the p-value small?
If we are wondering if there are differences between 4 group proportions,
and Pearson's X-squared statistic is 87.5, is there evidence the
group proportions differ?
Chapter 9: Study Notes
Lecture
Notes Lecture notes for chapter 9 in acrobat format.
Do the following assignment. The problems listed are from
"Introduction to the Practice of Statistics".
When you have worked on the problems and are ready to turn in
your findings, click the assignment
link below. It will take you to a template where you can fill in your
answers to the questions. When you are
finished entering your answers, click the submit button, you will be
given the location of your completed web
page. You may check your assignment responses with your browser at any
time, and submit a revision at any
time before the due date of the assignment. The due date is Thursday,
August 19. .
