Exam: 250712RR - Probability

Preview 2 of 4 pages

See the first 2 pages exactly as they appear in the document.

Page 1
Read page 1 as text
Student ID: 22039100 Exam: 250712RR - Probability When you have completed your exam and reviewed your answers, click Submit Exam . Answers will not be recorded until you hit Submit Exam . If you need to exit before completing the exam, click Cancel Exam . Questions 1 to 20: Select the best answer to each question. Note that a question and its answers may be split across a page break, so be sure that you have seen the entire question and all the answers before choosing an answer. 1. Approximately how much of the total area under the normal curve will be in the interval spanning 2 standard deviations on either side of the mean? A. 68.3% B. 99.7% C. 50% D. 95.5% 2. Using the standard normal table in the textbook, determine the solution for P (0.00 ≤ z ≤ 2.01). A. 0.0222 B. 0.4778 C. 0.4821 D. 0.1179 3. The probability of an offender having a speeding ticket is 35%, having a parking ticket is 44%, having both is 12%. What is the probability of an offender having either a speeding ticket or a parking ticket or both? A. 79% B. 91% C. 67% D. 55% 4. If the mean number of hours of television watched by teenagers per week is 12 with a standard deviation of 2 hours, what proportion of teenagers watch 16 to 18 hours of TV a week? (Assume a normal distribution.) A. 2.1% B. 4.2% C. 4.5% D. 0.3% 5. Each football game begins with a coin toss in the presence of the captains from the two opposing teams. (The winner of the toss has the choice of goals or of kicking or receiving the first kickoff.) A particular football team is scheduled to play 10 games this season. Let x = the number of coin tosses that the team captain wins during the season. Using the appropriate table in your textbook, solve for P (4 ≤ x ≤ 8). A. 0.246
Page 2

2 more pages in the full document

Unlock it once and it stays in your library, ready to chat with or turn into flashcards.