Tufts University
Fall Semester 2011-2012
Economics 13
Professor Downes
Final Examination
This exam is worth 100 points. The point value of each question is indicated. You should allocate the
number of minutes indicated to each question. Do questions 1, 2,
Tufts University
Fall Semester 2012-2013
Economics 13
Professor Downes
Solutions to 2nd Midterm Exam
1)a) Let Y be the number of students who favor the change. Then, if n=16 and p=0.05, from Table D.5,
we know that
P(Y1) = 1 P(Y<1) = 1 P(Y=0) = 1 0.4401 =
Tufts University
Fall Semester 2011-2012
Economics 13
Professor Downes
Solutions to 2nd Midterm Exam
1)a) Let X be the number of prospects who make purchases. Then, X is a binomial random variable. In
this part, X has parameters n=20 and p=0.15. From Tabl
Tufts University
Fall Semester 2011-2012
Economics 13
Professor Downes
2nd Term Examination
This exam is worth 100 points. The point value of each question is indicated. You should allocate the
number of minutes indicated to each question. Each question m
Tufts University
Fall Semester 2011-2012
Economics 13
Professor Downes
Solutions to Final Exam
1) a) Let A be the event a student in the statistics class is an Economics major, B be the event a
student in the statistics class is an International Relations