Recall Exercise 8.1.15 about the relationship between heart disease and baldness. The data are provided in the file HeartDiseaseAndBaldness.

a. Identify the observational units.

b. Describe the parameter(s) of interest and assign appropriate symbol(s) to the parameter(s).

c. State in words the appropriate null and alternative hypotheses in the context of the study.

d. State in symbols the appropriate null and alternative hypotheses in the context of the study.

e. Use a theory-based approach to test your hypotheses from the previous question. Report the p value and state your complete conclusion. Discuss your scope of conclusions: whether your results necessarily mean that heart disease is caused by baldness or baldness is caused by heart disease and whether you can extend your conclusions to a broader population.

Data from 8.1.15

Many studies have been done to look at the relationship between heart disease and baldness. In one study, researchers selected a sample of 663 heart disease male patients and a control group of 772 male patients not suffering from heart disease from hospitals in eastern Massachusetts and Rhode Island. Each was asked to classify their degree of baldness. The results are given in the following table. Use these data to answer the following questions.

Transcribed Image Text:

Baldness None Little Some Much Total Yes 251 165 195 52 663 Heart disease No 331 35 221 185 772 Total 582 1,435 386 380 87