Reference no: EM13121194

The probability of breast cancer is 1% for women at age forty who participate in routine screening. If a woman has breast cancer the probabilty is 80% that she will get a positive mammography. If a woman does not have breast cancer, the probability is 9.6% that she will also get a positive mammography. 

A woman in this age group had a positive mammography in a routine screening. What is the probability that she actually has breast cancer? 
10 out of every 1000 women at age forty, who participate in routine screening have breast cancer. 8 out of every 10 women with breast cancer will have a positive mammography. 950 out of every 990 women without breast cancer will also have a positive mammography. 
Here is a sample of women who have a positive mammography. How many of these women actually have breast cancer? 

Create a 2x2 table for the mammogram problem. 
Calculate 
1. Probability of having breast cancer. p(BC).
2. Probability of having BC given the mammogram is positive. p(BC/positive mammo)
3. Probability of having a positive mammogram given a person has BC. P(pos mammo/BC)