Elementary Statistics: Picturing the World (6th Edition)

Published by Pearson
ISBN 10: 0321911210
ISBN 13: 978-0-32191-121-6

Chapter 5 - Normal Probability Distributions - Review Exercises - Page 286: 11

Answer

Answer: 0.00235

Work Step by Step

Want to find P( z < -2.825) 1) -2.825 is between z = -2.820 and z = -2.830, so we have to find: P ( z < -2.82) = 0.0024 P(z < -2.83) = 0.0023 2) We take the average of the first two probabilities we found above: (0.0024 + 0.0023)/2 = 0.00235
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