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EDRM611: Applied Statistics

Homework for Statistics Lesson 8

Answer Completely.

Some calculations are required.

Due Tue., July 26, 2005, 10:30:00.000, EDT.

Due on the teacher's desk in BH114.

1. Identify the four steps of hypothesis testing.

    

    

    

2. Describe Type I and Type II errors, giving alternate nameS as well.

    

    

    

3. Give alternate names for one- and two-tailed tests.

    

    

    

4. How are the level of significance and confidence interval (page 203) related?

    

    

    

5. How are the critical value(s) and the region of rejection related?

    

    

    

6. Under what circumstances must you use the Student t distribution instead of the normal distribution?

    

    

    

7. Describe several characteristics of the Student t distribution.

    

    

    

8. What are degrees of freedom?

    

    

    

9. Find the 90th, 95th, and 99th percentile for the Student t distribution with 10 degrees of freedom.

    

    

    

10. How can researchers avoid the charge of playing a numbers game?

     

     

     

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