PT1_w09 - PSTAT 5A Your Name: Your TAs Name: Your Section...

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PSTAT 5A PRACTICE TEST 1 Winter 2009 Your Name: Your TA’s Name: Your Section Time: INSTRUCTIONS: FOLLOW CAREFULLY You have 50 minutes to complete this exam. You should attempt ALL questions. Anyone found copying another students’ work, or cheating in any other way, will be given an ‘F’ for the course. You are NOT allowed to consult your notes or textbook during this test. You may use a calculator. You may NOT use a cell phone as a calculator. Read each question carefully . Answer all questions. You must show your work clearly: NO WORK = NO CREDIT 1
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PRACTICE TEST 1 Winter 2009 PSTAT 5A TEST 1 FORMULA SHEET Probability of a union of 2 events [general case]: ( 29 ( 29 ( 29 ( 29 B A P B P A P B A P - + = For independent events A and B: ( 29 ( 29 ( 29 B P A P B A P = The probability that events A and B happen together is ( 29 ( 29 ( 29 A P A B P B A P = . Expected Value of a Discrete Random Variable: ( 29 ( 29 = x all x xp X E Variance of a Discrete Random Variable: ( 29 ( 29 2 2 μ - = x all x p x X Var Binomial Distribution If X is BIN ( n, p ) then mean = np; Variance =
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This note was uploaded on 03/01/2009 for the course STAT PSTAT 5A taught by Professor Gellar during the Spring '09 term at UCSB.

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PT1_w09 - PSTAT 5A Your Name: Your TAs Name: Your Section...

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