Essentials of Statistics (5th Edition)

Published by Pearson
ISBN 10: 0-32192-459-2
ISBN 13: 978-0-32192-459-9

Chapter 1 - Introduction to Statistics - Review - Chapter Quick Quiz - Page 35: 9

Answer

Observational Study

Work Step by Step

The data described with the randomly selected adults who were asked whether they smoke is an observational study and not an experiment because in an experiment, you need to randomly assign the subjects to treatments. The data is collected by a survey here and there is no treatment assigned.
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