1. if a product contains 550 critical parts for a month's production and you expect that 10 of those parts will be defective, what is the approximate base rate for defects? 1% 1.8% 2.2% 3.1% -select- 2. if the test used in question 1 is 90% accurate, how many positive tests of defects can you expect out of the 550 parts? 45 54 63 97 -select- 3. what is the approximate probability of a genuinely defective part given a positive test result: p(truly positive case | positive test result)? 7.5% 10.8% 12.5% 14.3%