Answer
There is sufficient evidence to support the claim.
Work Step by Step
The z value is:
Mean = $\frac{92 + 126 + 114 + ... + 97 + 101 + 106}{30}$ = 105.7
z = $\frac{x-u}{o/\sqrt n}$ = $\frac{105.7 - 90}{15/\sqrt 30}$ = 5.73
P $ \approx$ 0
The Basic Practice of Statistics 7th Edition
by Moore, David S.; Notz, William I.; Fligner, Michael A.
Published by
W. H. Freeman
ISBN 10:
146414253X
ISBN 13:
978-1-46414-253-6
Chapter 19 - From Data Production to Inference: Part III Review - Supplementary Exercises - Page 451: 19.56b
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