Help scott biostats
posted by maria .
The value of mammography as a screening test for breast cancer has been controversial, particularly among young women. A study was recently performed looking at the rate of false positives for repeated screening mammograms among approximately 10,000 women who were members of Harvard Pilgrim Health Care, a large healthmaintenance organization in New England. The study reported that of a total of 1996 tests given to 4049 year old women, 156 yielded false â€“positives results.
Some physicians feel a mammogram is not costeffective unless one can be reasonably certain (e.g., 95% certain) that the falsepositive rate is less than 10%. Can you address this issue based on the preceding data? (Hint: Use a CI approach.) PLEASE NEATLY SHOW ALL WORK!
I think it's part a) .98
part b)
.96 to .99

google "single sample confidence interval"
look at the 1st article
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