ECON 250 Midterm: ECON 250 Pastmidterm2 mid Nov 06 ans

• 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 booklet. 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. P (x > 1) = p (cid:18) x (cid:0) (cid:22) 2 (cid:19) = p (z (cid:21) 0:5) = 1 (cid:0) :6915 = :3085 (d) p (2 (cid:2) z (cid:0) 1 < (cid:0)1) this is a linear transformation x = 2 (cid:2) z (cid:0) 1. P (x (cid:20) (cid:0)1) = p x (cid:0) (cid:22) = p (z (cid:20) 0) = :5 (e) p ((cid:0)d < z < d) = :85 (cid:12)nd d. P ((cid:0)d < z < d) = :85 =) d (cid:25) 1:44: (10 marks) two variables are distributed as. X (cid:24) n (10; 36) and y (cid:24) n ((cid:0)4; 25) with (cid:26)xy = (cid:0):1.