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Unformatted text preview: Each of the 20 multiple choice questions is worth 2 points (40 points total). Circle your answers. 1. Suppose the population standard deviation is known. You perform a two-sided test of significance to test the hypothesis H : = . Your test statistic z = 1.90. You would _____ the null hypothesis at 10% significance level. You would _____ the null hypothesis at the 5% significance level. A) reject, reject B) reject, not reject C) not reject, reject D) not reject, not reject 2. A 99% confidence interval for is (0.55, 0.65). Performing a two-sided test, you would _____ H : = 0.54 at the 1% significance level. Performing a two-sided test, you would _____ H : = 0.68 at the 1% significance level. A) reject, reject B) reject, not reject C) not reject, reject D) not reject, not reject 3. If X and Y have correlation , and < 0 , then 2 Y X + _____ 2 X + 2 Y . If X and Y have correlation , and > 0 , then 2 Y X- _____ 2 X + 2 Y . A) >, > B) >, < C) <, > D) <, < 4. The _____ of any collection of events is the event that at least one of the collection occurs. Deal 15 cards from a shuffled deck (52 cards) and count the number Y of red cards. The count Y _____ have a binomial distribution. A) intersection, does B) intersection, does not C) union, does D) union, does not 5. If the variance of the conditional distribution of u i given X i is constant for i =1,, n , then the errors are _____. A) heteroskedastic B) homoskedastic 6. Consider tossing a pair of fair dice two times. Consider the following events: A = 9 on the first roll, B = 10 or less on the second roll. Events A and B _____. Events A and B _____....
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This note was uploaded on 02/22/2012 for the course PAM 2100 taught by Professor Abdus,s. during the Fall '08 term at Cornell University (Engineering School).
- Fall '08