Bluman A.G. Elementary Statistics- A Step By Step Approach

246 Chapter 4 Probability and Counting RulesChapter QuizDetermine whether each statement is true or false. If thestatement is false, explain why.1. Subjective probability has little use in the realworld. False2. Classical probability uses a frequency distribution tocompute probabilities. False3. In classical probability, all outcomes in the samplespace are equally likely. True4. When two events are not mutually exclusive,P(A or B) P(A) P(B). False5. If two events are dependent, they must have the sameprobability of occurring. False6. An event and its complement can occur at the sametime. False7. The arrangement ABC is the same as BAC forcombinations. True8. When objects are arranged in a specific order, thearrangement is called a combination. FalseSelect the best answer.9. The probability that an event happens is 0.42. What isthe probability that the event won’t happen?a. 0.42 c. 0b. 0.58 d. 110. When a meteorologist says that there is a 30% chance ofshowers, what type of probability is the person using?a. Classical c. Relativeb. Empirical d. Subjective11. The sample space for tossing 3 coins consists of howmany outcomes?a. 2 c. 6b. 4 d. 812. The complement of guessing 5 correct answers on a5-question true/false exam isa. Guessing 5 incorrect answersb. Guessing at least 1 incorrect answerc. Guessing at least 1 correct answerd. Guessing no incorrect answers13. When two dice are rolled, the sample space consists ofhow many events?a. 6 c. 36b. 12 d. 5414. What is n P 0 ?a. 0 c. nb. 1 d. It cannot be determined.15. What is the number of permutations of 6 differentobjects taken all together?a. 0 c. 36b. 1 d. 72016. What is 0!?a. 0 c. Undefinedb. 1 d. 1017. What is n C n ?a. 0 c. nb. 1 d. It cannot be determined.Complete the following statements with the best answer.18. The set of all possible outcomes of a probabilityexperiment is called the . Sample space19. The probability of an event can be any number betweenand including and . 0, 120. If an event cannot occur, its probability is . 021. The sum of the probabilities of the events in the samplespace is . 122. When two events cannot occur at the same time, theyare said to be . Mutually exclusive23. When a card is drawn, find the probability of getting1a. A jack 131b. A4 13c. A card less than 6 (an ace is considered above 6)24. Selecting a Card When a card is drawn from a deck,find the probability of gettinga. A diamond14 b. A 5 or a heartc.11A 5 and a heart 52 d. A king 13e. A red card1225. Selecting a Sweater At a men’s clothing store, 12 menpurchased blue golf sweaters, 8 purchased greensweaters, 4 purchased gray sweaters, and 7 bought blacksweaters. If a customer is selected at random, find theprobability that he purchased12a. A blue sweater 3112b. A green or gray sweater 31c. A green or black or blue sweaterd. A sweater that was not black26. Rolling Dice When 2 dice are rolled, find theprobability of getting2431273111a. A sum of 6 or 7 365b. A sum greater than 8 18c. A sum less than 3 or greater than 81d. A sum that is divisible by 3 3e. A sum of 16 0f. A sum less than 11 111211364134134–66