Answer
-0.77.
Work Step by Step
The z-score: $z=\frac{value-mean}{standard \ deviation}=\frac{6-11.4}{7}=-0.77$.
Essentials of Statistics (5th Edition)
by Triola, Mario F.
Published by
Pearson
ISBN 10:
0-32192-459-2
ISBN 13:
978-0-32192-459-9
Chapter 3 - Statistics for Describing, Exploring, and Comparing Data - Review - Chapter Quick Quiz - Page 127: 5
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