This Problem Set is a part of the Lesson 16, Unit 5, Grade 7. Students should do Problems 1 and 3 to be sure they understand the concepts in the lesson. Problem 2(b) can be used to engage students in generating and analyzing random samples using technology. Consider having students work in pairs to generate and record the numbers in the random samples to see whether the teacher's method of collecting homework turns out to be relatively "fair" for students.