1_Chap4Stats

1_Chap4Stats - Review Assessment Test Chapter 4 User...

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Review Assessment: Test Chapter 4 User Elizabeth S Knowles Submitted 2/7/08 9:24 AM Name Test Chapter 4 Status Completed Score 70 out of 80 points Time Elapsed 1 hours, 18 minutes, and 33 seconds out of 3 hours and 0 minutes allowed. Instructions Question 1 2 out of 2 points Find the indicated probability. A bag contains 2 red marbles, 3 blue marbles, and 5 green marbles. If a marble is randomly selected from the bag, what is the probability that it is blue? Selected Answer: Correct Answer: Question 2 2 out of 2 points From the information provided, create the sample space of possible outcomes. Flip a coin twice. Selected Answer: HH HT TH TT Correct Answer: HH HT TH TT Question 3 2 out of 2 points From the information provided, create the sample space of possible outcomes. Flip a coin three times. Selected Answer: HHH HHT HTH HTT THH THT TTH TTT Correct Answer: HHH HHT HTH HTT THH THT TTH TTT Question 4 2 out of 2 points Find the indicated probability. The table below shows the soft drinks preferences of people in three age groups.

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If one of the 255 subjects is randomly selected, find the probability that the person is over 40 and drinks cola. Selected Answer: Correct Answer: Question 5 2 out of 2 points Find the indicated probability. An unprepared student makes random guesses for the ten true-false questions on a quiz. Find the probability that there is at least one correct answer. Selected Answer: Correct Answer: Question 6 0 out of 2 points Find the indicated probability. Find the probability that 3 randomly selected people all have the same birthday. Ignore leap years. Selected Answer: 0.00000002 Correct Answer: 0.00000751 Question 7 2 out of 2 points Find the indicated probability. In one town, 53% of all voters are Democrats. If two voters are randomly selected for a survey, find the probability that they are both Democrats. Selected Answer: 0.281 Correct Answer: 0.281 Question 8 2 out of 2 points Find the indicated probability. Based on meteorological records, the probability that it will snow in a certain town on January 1st is 0.206. Find the probability that in a given year it will not snow on January 1st in that town. Selected Answer: 0.794 Correct Answer: 0.794
Question 9 2 out of 2 points Find the indicated probability.

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