A quality inspector expects 2% of bolts to be faulty. In a sample of 650 bolts she finds 13 faulty. This is:

  1. exactly the expected number
  2. more than expected
  3. fewer than expected
  4. impossible
Answer

A) exactly the expected number

650 0.02 = 13. SLO M-09-C-08 · Application

Mathematics MCQ · More Relative and Expected Frequencies MCQs · Practise