Question 2: A teacher offers the following data to show that good attendance is important. Days Absent 8 Final Grade 72 2 0 75 11 82 68 15 20 66 30 A student with a graphing calculator points out that the data indicate that anyone who misses 17 days or more is in danger of failing the course. a) Show how the student arrived at this conclusion. [4 marks] b) Identify and explain the problems that make the conclusion invalid. [3 marks] c) Outline statistical methods to avoid these problems. [2 marks]

Question 2: A teacher offers the following data to show that good attendance is important. A student with a graphing calculator points out that the data indicate that anyone who misses 17 days or more is in danger of failing the course. a) Show how the student arrived at this conclusion. [4 marks] b) Identify and explain the problems that make the conclusion invalid. [ 3 marks] c) Outline statistical methods to avoid these problems. [2 marks]