Stats--Review-Chapt03

Stats--Review-Chapt03 - Review: Chapter 3: Probability 1....

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Review: Chapter 3: Probability 1. Concepts: (1) Event (2) Simple event (3) Sample space (4) Basic Rules for Computing Probability (a) Rule 1: Relative Frequency Approximation (b) Rule 2: Classical approach (c) Rule 3: Subjective Probabilities (5) Law of Large Numbers (6) Complementary Events (7) Compound Event (8) Independent Events and Dependent Events 2. Practicing Problems: Find the indicated probability. 1) A sample space consists of 80 separate events that are equally likely. What is the probability of each? A) 1 B) 0 C) 1/80 D) 80 2) On a multiple choice test, each question has 4 possible answers. If you make a random guess on the first question, what is the probability that you are correct? A) 4 B) 1 C) 1/4 D) 0 3) A die with 12 sides is rolled. What is the probability of rolling a number less than 11? A) 1/12 B) 10 C) 5/6 D) 11/12 4) A bag contains 6 red marbles, 3 blue marbles, and 7 green marbles. If a marble is randomly selected from the bag, what is the probability that it is blue? A) 1/3 B) 3/16 C) 1/13 D) 1/7 Answer the question, considering an event to be "unusual" if its probability is less than or equal to 0.05. 11) Is it "unusual" to get a 12 when a pair of dice is rolled? A) Yes B) No 12) Is it "unusual" to get 3 when a pair of dice is rolled? A) No B) Yes 13) A multiple choice question has 14 possible answers, only one of which is correct. Is it "unusual" to answer a question correctly if a random guess is made? A) No B) Yes Use the relative frequency approach to estimate the probability of the event. 21)
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Stats--Review-Chapt03 - Review: Chapter 3: Probability 1....

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