Basic Statistics: Tales of Distributions 10th Edition

Published by Cengage Learning
ISBN 10: 0-49580-891-1
ISBN 13: 978-0-49580-891-6

Chapter 7 - Theoretical Distributions Including the Normal Distribution - Problems: 7.8

Answer

(a) The value from column B is .0832 (b) The value from column C is .2912 (c) The value from column B is .4778

Work Step by Step

(a) We use the table of Normal curve areas to find the proportion of the normal distribution between the mean and zeta= .21. First, go to column A to find the zeta score of .21. Then, use column B to find the proportion of the curve between the mean (mu) and a zeta score of .21 (b) We use the table of Normal curve areas to find the proportion of the normal distribution that is beyond zeta= .55. First, go to column A to find the zeta score of .55. Then, use column C to find the proportion of the curve greater that a zeta score of .55 (from zeta to infinity). (c) We use the table of Normal curve areas to find the proportion of the normal distribution between the mean and zeta= - 2.01. First, go to column A to find the zeta score of 2.01. Then, use column B to find the proportion of the curve between the mean (mu) and the zeta score of 2.01.
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