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Unformatted text preview: must sum to 1 3. If P (A) = 1, this means A always happens 4. If P(A) = 0, this mean A never happens • EX. Die Toss ○ Sample Space: {1,2,3,4,5,6} what is the probability of: 1. Rolling a 5? 2. Rolling an even number? 3. Rolling a number less than 1? Note: when assigning probabilities, we use the law of large numbers— page 123 ○ Answers (fig 3.12) ○ Venn Diagram for Part 2 Let A = rolling an even number (fig 3.13) • Steps for calculating event probabilities ○ 1. Define the experiment Tossing a die ○ 2. List sample points 1,2,3,4,5,6 ○ 3. Assign probabilities 1/6 each ○ 4. What is in the event? Getting a 5 ○ 5. Sum the sample point probabilities to get the event probability STA Class 8/29/2008 1/6...
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 Fall '07
 Bagwhandee
 Statistics, Probability, Probability theory

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