exam2-review-ss

exam2-review-ss - The UNIVERSITY of NORTH CAROLINA at...

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6/3/11 review for exam 2 1 STOR 155 Introductory Statistics Review for Midterm Exam 2 The UNIVERSITY of NORTH CAROLINA at CHAPEL HILL
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6/3/11 review for exam 2 2 Midterm Exam 2 • When: Tuesday 6/7 • Where: In class • Cover: Sec. 4.1 – 4.5, 5.1 – 5.2 • Format: – about 30 questions (multiple choice) – closed-book, calculator needed – scantron
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6/3/11 review for exam 2 3 Review of Chapter 4 • Sample spaces, events, union, intersection, complement, disjoint events • Probability rules : addition, multiplication • Random variables, probability distributions, means, variances, rules for means and variances • Conditional probability, independence • Venn and tree diagrams
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review for exam 2 4 Probability Rules • For any event A , P ( A ) = 1 - P ( not A ). • For any two events A and B , P ( A B ) = P ( A ) + P ( B ) - P ( A B ). • If A, B, C , … are disjoint, then P ( A or B or C or ...) = P ( A ) + P ( B ) + P ( C ) + … • Conditional probability: • For any two events A and B , P ( A and B ) = P ( A ) P ( B | A ) = P ( B ) P ( A | B ) .
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This note was uploaded on 11/18/2011 for the course STOR 155 taught by Professor Andrewb.nobel during the Summer '08 term at UNC.

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exam2-review-ss - The UNIVERSITY of NORTH CAROLINA at...

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