mid-prc - PSTAT 5E Feb. 14, 2006 PSTAT 5E Midquarter...

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Unformatted text preview: PSTAT 5E Feb. 14, 2006 PSTAT 5E Midquarter Examination, Winter 2006 12:30pm - 1:45pm DO NOT TURN TO THE QUESTIONS UNTIL TOLD TO DO SO! NAME: PERM #: NAME OF YOUR TA: HOURS OF YOUR DISCUSSION SECTION: INSTRUCTIONS: You have 1 hour and 15 minutes to complete this exam. You should attempt ALL questions. You are allowed to consult your textbook and class notes. In order to receive full credit, you need to show your work. Anyone found copying another students work will be given zero score. Questions 1 2 3 4 5 total Points available 20 20 20 20 20 100 Points awarded GOOD LUCK!!! 1 PSTAT 5E Feb. 14, 2006 1. The probability distribution of a discrete random variable X is shown in the following table: x 1 2 3 4 5 P(X=x) 0.2 0.3 p 0.1 0.2 (a) Find the missing value p. (b) Find P(X < 2). (c) Find mean and variance of the random variable X. 2 PSTAT 5E Feb. 14, 2006 2. The following are ages of 5 UCSB students, randomly selected from those who have lunch in the UCen: 21 , 18 , 19 , 31 , 22 (i) Find mean, median and inter-quartile range....
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mid-prc - PSTAT 5E Feb. 14, 2006 PSTAT 5E Midquarter...

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