A recent study of breast cancer revealed that 13% of thewomen in the sample used

A recent study of breast cancer revealed that 13% of thewomen in the sample used antibiotics more than 500 days in theirlifetime. Further 79% of these heavy antibiotics users developedbreast cancer. According to the American Cancer Society one intwelve women will develop breast cancer at some time in her life.Of the numbers mentioned which are parameters?