Statistics: Informed Decisions Using Data (4th Edition)

Published by Pearson
ISBN 10: 0321757270
ISBN 13: 978-0-32175-727-2

Chapter 13 - Section 13.2 - Consumer Reports - Tea Antioxidants: An Unexpected Side Benefit to a Cheap and Tasty Beverage - Page 645: b

Answer

It seems that there are no outliers. There is no unusual observation. The populations from which the samples were extracted must be normally distributed.

Work Step by Step

All the observations for each of the six brands lie within 2 standard deviations around the mean.
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