ECON 250 Midterm: ECON 250 Pastmidterm2 Econ250 M2 W08

• School: Queen's University
• Department: Economics
• Course: ECON 250
• Professor: All

Document Summary

At the end of the exam are several formulae. Answers are to be written in the examination book- let. Most of the marks are awarded for showing how a calculation is done and not for the actual calculation itself! There are a total of 100 possible marks to be obtained. Do all 8 questions (marks are indicated): (10 marks) suppose that ve people, including you and a friend, line up at random. Let the discrete random variable x denote the number of people standing between you and your friend. Please write down the probability distribution function of x, p (x = x), and graph it. Also, write down the cumulative distribution function of x, p (x x). The pdf is: x p (x = x) The graph should have 4 bars, one each at x = 0, 1, 2, 3, of height. 10/10: (15 marks) consider the joint probability distribution.