Statistics: Informed Decisions Using Data (4th Edition)

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

Chapter 1 - Review - Review Exercises - Page 60: 31e

Answer

The explanatory variable is the type of stain remover (gum or saliva). It is a qualitative variable.

Work Step by Step

As given above.
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