Statistics (12th Edition)

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

Chapter 5 - Continuous Random Variables - Exercises 5.1 - 5.19 - Learning the Mechanics: 5.4b

Answer

0.50

Work Step by Step

$P(20 \leq x \leq 30) = ∫_{20}^{30} f(x).dx$ = $∫_{20}^{30} \frac{1}{d-c}.dx$ = $∫_{20}^{30} \frac{1}{20}.dx$ = 1/20 (30-20) = 10/20 = 0.50
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