Читать книгу Applied Biostatistics for the Health Sciences - Richard J. Rossi - Страница 21

In a study investigating the average survival time for stage IV melanoma patients receiving two different doses of interferon, n = 150 patients will be monitored. The age, sex, race, and tumor thickness of each patient will be recorded along with the time they survived after being diagnosed with stage IV melanoma. For this study, determine the following components of the statistical protocol:

1 a. the target population,

2 b. the units of target population,

3 c. the response variable,

4 d. the explanatory variables,

5 e. the parameter of interest,

6 f. the treatments,

7 g. the sample size.

Solutions

1 a. The target population in this study is individuals diagnosed with stage IV melanoma.

2 b. Units of the target population are the individuals diagnosed with stage IV melanoma.

3 c. The response variable in this study is the survival time after diagnosis with stage IV melanoma.

4 d. Explanatory variables in this study are age, sex, race, and tumor thickness.

5 e. The parameter of interest in this study is the average survival time after diagnosis with stage IV melanoma.

6 f. Treatments are the two different doses of interferon.

7 g. The sample size is n = 150.