A police officer stops a speeding driver on saturday nigt and gives hima breathalzer test. the test shows that his estimated blood alcohol content is above .08 g/dl, and this is considered evidence of driving while intoxicated. suppose that a breathalyzer test has a false positive rate of 5% and a false negative rate of 10%.
Also, assume that in this town on a saturday night 8% of drivers are intoxicated. what is a chance that a driver who has a positive Breathalyzer test is actually driving while intoxicated (DWI)?