MATH 203 Midterm: MATH203 Winter 2009 Exam

• School: McGill University
• Department: Mathematics and Statistics
• Course: MATH 203
• Professor: All

Document Summary

Answer directly on the test (use front and back if necessary). One 8. 5 11 two-sided sheet of notes is allowed. There are 17 pages to this exam and 2 pages of tables. The total number of marks for the exam is 100. The canadian government has decided that there was some suspicious, potentially illegal activity regarding a company"s revenue stream. As part of their investigation, they wanted to establish that there was a signi cant increase in the mean transaction amount before and after a particular event. The government statistician took a random sample of transactions with 50 customers who were billed both before and after the date of interest (i. e. each customer was billed twice). The data are summarized in the table below: Test for a signi cant increase in the mean transaction amount before and after the event at. Professor steele gave out a surprise quiz during one of his classes.