Suppose that among 10,000 women whose mammograms showed no abnormalities, two will be diagnosed with breast...
Breast cancer occurs most frequently among older women. Of all age groups, women in their 60s have the highest rate of breast cancer. It is estimated that 3.7% of women in their 60s get breast cancer. Mammograms are X-ray images of the breast used to detect breast cancer. A mammogram can typically identify correctly 84.9% of cancer cases (sensitivity = 84.9%) and 95.13% of cases without cancer (specificity = 95%). (This is exactly like problem #11) First write down the...
About 20 women in 80,000 have breast cancer. Suppose the mammogram detecting breast cancer when a woman has breast cancer is 0.90 and the mammogram detecting breast cancer on a woman who does not have breast cancer is 0.01. If a woman has breast cancer, what is the probability that the mammogram will not detect breast cancer? If the mammogram shows breast cancer, what is the probability that she truly has breast cancer? If the mammogram shows a woman has...
4. Breast cancer occurs most frequently among older women, Of all age groups, women in their 60s have the highest rate of breast cancer. It is estimated that 3.7% of women in their 60s get breast cancer. Mammograms are X-ray images of the breast used to detect breast cancer. A mammogram can typically identify correctly 84.9% of cancer cases (sensitivity 84.9%) and 95.13% of cases without cancer (specificity = 95%). (This is exactly like problem #11) First write down the...
Breast cancer is the most common non-skin malignancy among women in the United States, and it is the second leading cause of death from cancer among women (lung cancer ranks Ă–rst). A mammogram is a diagnostic procedure designed to quickly detect breast cancer. Such a test can exhibit two kinds of errors: One error is known as a false positive: The test incorrectly indicates cancer in a healthy woman. The other error (which is more serious error in this situation)...
We know that the proportion of women who have been diagnosed with breast cancer in the general population is 0.013 or 1.3%. We think that a meaningful difference in proportion of women who have ever been diagnosed with breast cancer is |p0-p1| = 0.02 or 2% difference. for all cal. let alpha = 0.05 A. What sample size is needed to have 90% poor to detect this difference assuming that we use a two sided test. B. If we have...
eBook A seven-year medical research study reported that women whose mothers took the drug DES during pregnancy were twice as likely to develop tissue abnormalities that might lead to cancer as were women whose mothers did not take the drug a. This study compared two populations. What were the populations? - Select your answer b. Do you suppose the data were obtalned In a survey or In an experiment? Select your answer * c.For the population of women whose mothers...
eBook A seven-year medical research study reported that women whose mothers took the drug DES during pregnancy were twice as likely to develop tissue abnormalities that might lead to cancer as were women whose mothers did not take the drug a. This study compared two populations. What were the populations? - Select your answer b. Do you suppose the data were obtalned In a survey or In an experiment? Select your answer * c.For the population of women whose mothers...
eBook A seven-year medlcal research study reported that women whose mothers took the drug DES during pregnancy were twlce as llkely to develop tissue abnormalitles that might lead to cancer as were women whose mothers did not take the drug a. This study compared two populations. What were the populations? women whose mothers took DES during pregnancy and women whose mothers did not. b. Do you suppose the data were obtained in a survey or in an experiment? Survey c....
1. A hypothesis has been proposed that breast cancer in women is caused in part by events that occur between the age of menarche (time of 1st menstruation) and the age of first childbirth. The hypothesis is that the risk for breast cancer increases as the length of this time interval increases. To test this hypothesis an international study was set up. Breast cancer cases were identified among women in selected hospitals in the United States, Greece, Yugoslavia, Brazil, Taiwan...
A prospective study of Norwegian women who were followed between 1986 and 2009 was conducted. Within that period (1995-2005), a national mammography program was gradually implement ed, with biennial invitations send to women age 50-69. The participants of the study were all women aged 50-79 between 1986-2009. The mortality rate ratios compared women who were invited to screen to those who were not invited, with a clear distinction between cases of breast cancer diagnosed before and after the invitation to...