Question: Senturia et al. (1994) describe a survey taken to study how many children have access to guns in their households. Questionnaires were distributed to all parents who attended selected clinics in the Chicago area during a 1-week period for well- or sick-child visits.
a. Suppose the quantity of interest is percentage of the households with guns. Describe why this is a cluster sample. What is the psu? The ssu? Is it a one-stage or two-stage cluster sample? How would you estimate the percentage of households with guns and the standard error of your estimate?
b. What is the sampling population for this study? Do you think this sampling procedure results in a representative sample of households with children? Why, or why not?