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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