QUESTION 20 Polly is a driving test examiner and has kept records of all the tests she has conducted over the last year. Overall 60% of her candidates passed. Her data is shown in the table below. % who had more than 20 lessons 30 % who both had more than 20 lessons and passed the test 25 % who took the test on a Monday 20 % who both took the test on a Monday and passed the test 12 % who were aged over 25 10 % who both took were aged over 25 and passed the test 6 % who wore glasses 55 % who both wore glasses and passed the test 33 Which ONE of the following pairs of probabilities does Polly’s data suggest are NOT independent probabilities? A. Having more than 20 lessons and passing the test. B. Taking the test on a Monday and passing the test. C. Being aged over 25 and passing the test. D. Wearing glasses and passing the test.
QUESTION 20 Polly is a driving test examiner and has kept records of all the tests she has conducted over the last year. Overall 60% of her candidates passed. Her data is shown in the table below. % who had more than 20 lessons 30 % who both had more than 20 lessons and passed the test 25 % who took the test on a Monday 20 % who both took the test on a Monday and passed the test 12 % who were aged over 25 10 % who both took were aged over 25 and passed the test 6 % who wore glasses 55 % who both wore glasses and passed the test 33 Which ONE of the following pairs of probabilities does Polly’s data suggest are NOT independent probabilities? A. Having more than 20 lessons and passing the test. B. Taking the test on a Monday and passing the test. C. Being aged over 25 and passing the test. D. Wearing glasses and passing the test.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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QUESTION 20
- Polly is a driving test examiner and has kept records of all the tests she has conducted over the last year. Overall 60% of her candidates passed. Her data is shown in the table below.
% who had more than 20 lessons
30
% who both had more than 20 lessons and passed the test
25
% who took the test on a Monday
20
% who both took the test on a Monday and passed the test
12
% who were aged over 25
10
% who both took were aged over 25 and passed the test
6
% who wore glasses
55
% who both wore glasses and passed the test
33
Which ONE of the following pairs of probabilities does Polly’s data suggest are NOT independent probabilities?
A. |
Having more than 20 lessons and passing the test. |
|
B. |
Taking the test on a Monday and passing the test. |
|
C. |
Being aged over 25 and passing the test. |
|
D. |
Wearing glasses and passing the test. |
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