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Unformatted text preview: In Class Examples Chapter 14 1. For each of the following, list the sample space and tell whether you think the events are equally likely: a. Roll two dice; record the sum of the numbers b. A family has 3 children; record each child’s sex in order of birth c. Toss 4 coins; record the number of tails d. Toss a coin 10 times; record the longest run of heads 2. Many stores run “secret sales”: Shoppers receive cards that determine how large a discount they get, but the percentage is hidden by a scratch off that you can scratch off only after the purchase has been totaled at the cash register. The store is required to reveal (in the fine print) the distribution of discounts available. Which of these probability assignments are plausible? Probabilities of… 10% off 20% off 30% off 50% off a) 0.20 0.20 0.20 0.20 b ) 0.50 0.30 0.20 0.10 c) 0.80 0.05 0.05 0.05 d ) 0.75 0.25 0.25-0.25 e) 1.00 3. In a large Introductory Statistics lecture hall, the professor reports that 55% of the students enrolled have...
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- Spring '08
- Probability, Probability theory, Academic term