Concept explainers
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 health-maintenance organization in New England [9].
The study reported that of a total of 1996 tests given to 40- to 49-year-old women, 156 yielded false-positive results.
Suppose a woman is given a mammogram every 2 years starting at age 40. What is the probability that she will have at least one false-positive test result among 5 screening tests during her forties? (Assume the repeated screening tests are independent.)
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Chapter 6 Solutions
Fundamentals of Biostatistics
- If all participants in a repeated measures research study show roughly the same difference between treatments, then the data will produce a statistically significant value for the t statistic. True or falsearrow_forwardAn article reports that blue-eyed people earn less than brown-eyed people, with the average blue-eyed salary at $35,000, the average brown-eyed salary at $37,000, and the p-value at 0.45. Based on that reported p-value and using the common definition of statistical significance, which of the following is true?arrow_forwardLandolt et al. (A-26) examined rates of posttraumatic stress disorder (PTSD) in mothers and fathers. Parents were interviewed 5 to 6 weeks after an accident or a new diagnosis of cancer or diabetes mellitus type I for their child. Twenty-eight of the 175 fathers interviewed and 43 of the 180 mothers interviewed met the criteria for current PTSD. Is there sufficient evidence for us to conclude that fathers are less likely to develop PTSD than mothers when a child is traumatized by an accident, cancer diagnosis, or diabetes diagnosis? Let alpha = 0.05arrow_forward
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill