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Researchers are assessing the specificity of a screening procedure for breast cancer in a population of 3000 women whose mothers had the disease. The presence or absence of a malignant condition is established by conventional mammography, which is assumed to be definitive for the purposes of comparison. The following data are collected:
![](data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMDYiIGhlaWdodD0iMTI5IiB2aWV3Qm94PSIwIDAgMzA2IDEyOSI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgZmlsbD0iI2NmZDRkYiIvPjwvc3ZnPg==)
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