A teacher assigns 10 questions for homework and wants to randomly pick 3 questions to be graded. He writes the numbers 1–10 on equally sized slips of paper and places them in a bag. He shakes the bag and selects 3 slips of paper. Is the sample of 3 questions a simple random sample? Yes, because the paper slips were equally sized.
Yes, because the paper slips were equally sized and the bag was shaken.
No, because there are only 10 questions.
No, because the questions were selected using a bag.