Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321755936
ISBN 13: 978-0-32175-593-3

Chapter 3 - Probability - Exercises 3.1 - 3.34 - Applying the Concepts - Advanced - Page 123: 3.31

Answer

Possible pairs = 1837 x 1837 Same bullet pairs = 1837 Total number of pairs of different bullets = 1837 x 1837 - 1837 = 3372732 No. of matches = 693 P (False Positive) = 693 / 3372732 = 0.000205 Hence we should have confidence in the FBI’s forensic evidence

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