Suppose that Ricky misses his flight. What is the probability that it was raining?
0.523 E 400
E 500 Some employers use lie detector tests to screen job applicants. Lie detector tests are not completely reliable. Suppose that a polygraph can correctly detect 65% of lies, but incorrectly identifies 16% of true statements as lies. Suppose that 90% of the job applicants tell the truth during the polygraph test. What is the probability that a person who fails the test was actually telling the truth?
0.689 E 500
F 100 A basketball player has made 66% of his foul shots during the season. Assuming the shots are independent, find the probability that in tonight's game he misses for the first time on his 6 th attempt?
0.0426 F 100
F 200 The amount of time that an individual must wait for the elevator by the bookroom is represented by a uniform distribution with mean of 15 seconds, a standard deviation of 3.9 seconds, and a range of 20 seconds. What is the probability that a random wait time is more than 10 seconds?
0.75 F 200
F 300 A test consists of 10 true/false questions. If a student guesses on each question, what is the probability that the student will answer at least 9 questions correctly?
0.0107 F 300
F 400 A company sells light bulbs in packages of 20 and estimates that the mean number of defective light bulbs in a package is 0.5 with a standard deviation of 0.7. If a customer buys 12 packages, what are the expected value and standard deviation of the number of defective light bulbs? Assume that packages are independent of each other.
mean = 6 st. dev. = 2.42 F 400
F 500 For an upcoming concert, each customer may purchase up to 3 child tickets and 3 adult tickets. The mean and the standard deviation for the number of adult tickets purchased by a single customer are 2 and 1.2, respectively, and the mean and the standard deviation for the number of child tickets purchased by a single customer are 1 and 1.3, respectively. Suppose each child ticket costs $15 and each adult ticket costs $25. Compute the standard deviation of the total amount spent per purchase .
$35.78 F 500
The Final Jeopardy Category is: Probability Please record your wager. Click on screen to begin
P( winning in game A) = 0.5, P( losing in game B) = 0.2, and the P( losing in at least one game) = 0.65, what is the P( winning in at least one game)? Click on screen to continue
- Summer '16