The file measles.dat contains data consistent with that obtained in a survey of parents whose children had not been immunized
a. Estimate, separately for each school, the percentage of parents who returned a consent form (variable returnf ). For this exercise, treat the no answer responses (value 9) as not returned.
b. Using the number of respondents in school i as mi, construct the sampling weight for each observation.
c. Estimate the overall percentage of parents who received a consent form along with a 95% CI.
d. How do your estimate and interval in part (c) compare with the results you would have obtained if you had ignored the clustering and analyzed the data as an SRS? Find the ratio:
What is the effect of clustering?
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Question Posted: December 12, 2015 04:14:50