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Hey guys! In this video weamp;#39;re going to use Excel to create a chart that shows the outcomes when dealing with medical tests. To get us started, I have an example. Suppose that 10,000 women with breast tumors are given mammograms, 1% of whom have malignant tumors. If the mammogram is 85% accurate, how many of the women whose results show a malignant tumor actually have a benign tumor? So, our chart consists of totals as well as the outcomes for the tests and whether the tumor is actually malignant or actually benign. To fill this in we have a particular set of steps we like to follow. So number one, fill in the total. Our total is the 10,000 women who were tested. Second, use the prevalence to find the number of women who actually have a malignant tumor. In this problem, the prevalence is the 1% who have the malignant tumor. So, out of our 10,000 women, we have point zero one for 1% times that 10,000 would be the number of women who actually have a malignant tumor. Then, third, s