MATH 1280 Unit 6 Graded Quiz Graded A

11/1/2019 Graded Quiz Unit 6 https://my.uopeople.edu/mod/quiz/review.php?attempt=1593426 1/10 Time taken 1 hour 21 mins Marks 20.00/20.00 Grade 100.00 out of 100.00 Quiz Instructions: All multiple choice answers are assumed to be rounded to the precision shown, with the last digit being within ± 1. Choose the best answer. There are 20 questions on this test, but you will see only about 4-6 questions on each screen. For items 1-4, use the distribution of the random variable Y as show in this table: Value -4 0 2 6 9 11 Probability .08 .13 .16 .19 .22 The missing probability value is: Select one: a. .14 b. .05 c. .22 d. .18 e. can not be determined The correct answer is: .22 Question 1 Correct Mark 1.00 out of 1.00 Information 11/1/2019 Graded Quiz Unit 6 https://my.uopeople.edu/mod/quiz/review.php?attempt=1593426 2/10 P(Y < 3) is equal to: Select one: a. .08 b. .13 c. .21 d. .37 e. .63 The correct answer is: .37 The expectation of Y, E(Y), is: Select one: a. 0.17 b. 0.50 c. 2.00 d. 5.45 e. 6.00 The correct answer is: 5.45 The standard deviation of Y (rounded to two decimal places) is: Select one: a. 4.29 b. 4.53 c. 4.71 d. 5.45 e. 6.00 The correct answer is: 4.71 Question 4 Correct Mark 1.00 out of 1.00 Question 3 Correct Mark 1.00 out of 1.00 Question 2 Correct Mark 1.00 out of 1.00