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Question: Example, was about the relationship between hormone therapy and invasive breast cancer. One of the results reported in the paper was, "Absolute excess risks per 10,000 person-years attributable to estrogen plus progestin were 8 more invasive breast cancers" (Writing Group for the Women's Health Initiative Investigators, 2002, p. 321). In other words, for every 10,000 "person-years" of women taking the hormones instead of a placebo, there would be eight additional cases of invasive breast cancer. Discuss practical versus statistical significance in this situation.
Example: Breast Cancer Risk Stops Hormone Replacement Therapy Study On July 17, 2002, the Journal of the American Medical Association published the results of a study that affected the lives of millions of women. The study was the first large randomized experiment to test the effects of combined estrogen and progestin, the most commonly prescribed hormone replacement therapy for postmenopausal women.
Who's the boss? The 2000 Census revealed that 26% of all firms in the United States are owned by women.
While 60 of the children's books are nonfiction. If a book is selected at random, find the probability of selecting the following not a children's nonfiction.
suppose the amount of time it takes a popcorn kernel to pop is normally distributed with a mean of 150 seconds and a
Tell whether each of the given relationships reflects a positive or a negative correlation the amount of stress in people's lives and the number of colds they get in the winter.
The interference theory of the serial position effect predicts that participants who are given extended practice will perform more poorly on the initial items.
Which distribution is preferred by a Rawlsian Social Welfare Function? Assume that utility is defined as u, = m, and recall that Rawlsian Social Welfare function would be equal to the minimum utility experienced by any person under the allocation
How large a sample is needed to reduce the margin of error to at most 0.01 (or 1%)? Be conservative by not assuming the sample proportion (obtained from the sample of 500) as the reasonable guess for p. Use the confidence level you found in part (..
transrail is bidding on a project that it figures will cost 400000 to perform. using a 25 markup it will charge 500000
The speed with which utility companies can resolve problems is very important. GTC, the Georgetown Telephone Company, reports they can resolve customer problems the same day they are reported in 70 percent of the cases.
Determine whether there is a significant difference in mean temperatures in three cities using ONE-WAY ANOVA. Determine whether there is significant difference in mean temperatures.
Explain how to test the hypothesis of no differences in the mean proportions of mouth fixations for the four background noise levels.
What fraction of the company's product is good? What percentage is blemished? If an unit of product is selected at random and found to be blemished, what is the probability that it was produced on machine B?
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