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Unformatted text preview: Exam I STAT 211 Fall 2010 NAME: STUDENT ID: • You have 75 minutes to complete this test. • You may use a one page cheat sheet and a calculator. • If I provide partial results—assume they are correct and use them even if they are not. • If there is no correct answer or if multiple answers are correct, select the best answer. • Mark your answer on the scantron, and turn in both the scantron and this test. • This test consists of 20 questions. Make sure you have all questions and Good luck! 1 1. In a small research lab, the researchers’ ages are 27 43 56 65 34 33 64 32 61 66. If we change the first number in the above data set to 17, then A. Mean will not change. B. Median will not change . C. Mean and median will both change. D. Median will change a little, mean will change a lot. E. Mean and median both will stay the same. 2. Location and variability of a data set can be described respectively by A. Median and interquartile range B. Mean and variance C. Median and standard deviation D. Mean and range E. All above. 3. Suppose A and B are two events, such that P ( A ) = 0 . 3, P ( B ) = 0 . 5 and P ( A ∪ B ) = 0 . 65, then A and B are: A. Not necessarily independent. B. Independent. C. Dependent. D. Not necessarily dependent....
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 Spring '07
 Parzen
 Standard Deviation, Mean, Probability theory, d., B., E.

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