ECON 250 Midterm: ECON 250 Pastmidterm2 Econ250midterm2W13

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

Document Summary

Answer all four questions in the answer booklet provided. She constructs the average exchange rate over a period of n = 25 trading days. What con dence level is required to give this interval: a demographer wishes to test the null hypothesis that average life expectancy in japan is 80 years against the alternative hypothesis that it is greater than 80 years. Suppose that he knows that the standard deviation of life expectancy in the population is = 3 years. He studies a sample of n = 9 people. (a) state the null and alternative hpotheses. Given the sample information, nd a range within which the p -value must lie. Economics 250 midterm test 2: answer guide: (a) five or more successes is the same thing as ve or fewer failures. The probability of failing to raise one"s score is 0. 4.