Answer
z=2.00
Work Step by Step
A z-score indicates how many standard deviations an element is from the mean, therefore here, the higher the z-score is the better for us, so we choose z=2.00.
Elementary Statistics (12th Edition)
by Triola, Mario F.
Published by
Pearson
ISBN 10:
0321836960
ISBN 13:
978-0-32183-696-0
Chapter 3 - Statistics for Describing, Exploring, and Comparing Data - 3-4 Measures of Relative Standing and Boxplots - Basic Skills and Concepts - Page 123: 2
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