Answer
Cross-section data.
Work Step by Step
The data was collected on different countries at the same period of time, which is at October 2014.
Introductory Statistics 9th Edition
by Mann, Prem S.
Published by
Wiley
ISBN 10:
1-11905-571-7
ISBN 13:
978-1-11905-571-6
Chapter 1 - Supplementary Exercises - Page 26: 1.41
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