1. A researcher, for reasons passing understanding, wishes to assess the association between gender and total cholesterol values. What would be the appropriate statistical procedure?
2. An HIV educator wishes to determine whether the method of delivering teaching influences adherence with antiretroviral therapy. She decides to measure adherence as viral load (a ratio measure). She teaches one group using lecture-discussion techniques. She adapts the information for access on the internet and gives another group the information using this medium. For yet another group, she decides to give a CD Rom for home study and then meets with individuals to answer any questions. She obtains viral loads for all clients for comparison. What procedure will determine the significance of any differences?
3. What statistical procedure was used to analyze data in study B?
4. How many groups were compared in study B?
5. How many subjects were enrolled in Study C?
6. Which study demonstrated the greatest level of statistical significance?
7. In which study is the likelihood of Type I error greatest?
8. What will be the predicted satisfaction score (expressed as a point estimate) for a patient with a pain relief score of 62?
9. What is the standard error of estimate when predicting satisfaction from knowledge of pain relief score?
10. What would be the interval estimate for satisfaction for the patient in problem 16?
11. Severity of pain is influenced by the timing of pain interventions in sickle-cell crises.
12. Immediate intervention is better than either slightly delayed intervention or initiation at crisis stage.
13. She has more than 99% confidence in her conclusion that severity of pain is influenced by timing.
14. In using the data from study A to make predictions, what percent of the time would you expect predictions to be exactly correct?
15. Which study would have the smallest margin of error in predicting one variable from knowledge of the other?
16. Were there significant differences between the groups? Give the relevant satirical data to support your answer?
17. What is the confidence interval associated with your answer to item # 24?