Answer
It is a retrospective study.
Work Step by Step
In this study they check records and data from past car crashes and they try to find out the effects of alcohol to the outcome. Therefore it is a retrospective study.
Elementary Statistics (12th Edition)
by Triola, Mario F.
Published by
Pearson
ISBN 10:
0321836960
ISBN 13:
978-0-32183-696-0
Chapter 1 - Introduction to Statistics - 1-4 Collecting Sample Data - Beyond the Basics - Page 34: 28
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