Chapter 10 – Study Notes

 

1. Review the 3 important properties of the Chi-square distribution
2. What are the assumptions of the chi-square distribution?
3. Does the observed frequency have to be at least 5?
4. What is a goodness-of-fit test?
5. There are two techniques used to determine the expected value. What are they?
6. How is the chi-square statistic calculated? What are the degrees of freedom? Is this a one-tailed or two-tailed test?
7. A large discrepancy between observed and expected values will lead to a _____ value of chi-square and a _____ P-value.
8. Read through the example on page 578-9, the calculations are given on 580.
9. The example on 581 gives an example of expected frequencies that are not equal.
10. What should be done if the expected frequency of a category is less than 5?
11. The STATDISK procedure is given on page 584

 

Work the odd problems on pages 584-589

 

12. What is a contingency table?
13. What are the assumptions for a chi-square test of independence?
14. How is the expected frequency calculated?
15. Read through the example on page 593-4
16. Another good example is on pages 596-598.
17. The STATDISK procedure is given on page 598.

 

Work through the odd problems on pages 598-604

 

Do the review exercises and cumulative review exercises on pages 605 –607

 

Students enrolled in Math 1442 should email answers to the following before taking the exam:

• Page 604 – answer the 2 questions in  Race and the Future
• Page 609 – answer the questions in the CRITICAL THINKING problem
• According to the Statistics at work section on pages 610-11, what skills are important for today’s college students?
• Assuming that the body temperature data (Data Set 6) came from a typical population, test to see if the number of females is the same in the regular population (assume that females are 50% of the population)

Email the answers to [email protected]

 

The Chapter 9 test will be available starting on __________ until ________. The test consists of 10 multiple choice questions and has a time limit of 20 minutes. You can use your textbook and notes as you take the exam