Math 3070-5: Midterm #2 (Sample)
Spring Semester 2002

1. Review Exercise 5, page 287.
2. Exercises 3 and 10, page 270.
3. Exercise 16, page 271.
4. A poll of 1190 adults finds that 702 prefer balancing the budget over cutting taxes (2001 data). The announced margin of error was plus or minuus 4 percentage points. Assuming that the confidence level is 95% in this statement, find a 95% confidence interval for the true proportion of people who prefer balancing the budget?
5. Ann Landers once asked the readers of her advce column, "If you had it to do over again, would you have children?" She received nearly 10,000 responses, almost 70& saying "NO!" If possible, find a 95% confidence interval for the true proportion of people who would say "NO!" to this question. If not possible, explain why it is not possible.

Last update: April 3, 2002