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9TH EDITION
On the cover: Hummingbirds are known for their speed, agility, and beauty. They range in size from the smallest
birds on earth to several quite large species—in length from 2 to 8.5 inches and in weight from 0.06 to 0.7 ounce.
Hummingbirds flap their wings from 12 to 90 times per second (depending on the species) and are the only birds
able to fly backwards. Normal flight speed for hummingbirds is 25 to 30 mph, but they can dive at speeds of around
60 mph.
Cover photograph: Hummingbird, C iDesign/Shutterstock
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For permission to use copyrighted material, grateful acknowledgment is made to the copyright holders
on page C-1, which is hereby made part of this copyright page.
Many of the designations used by manufacturers and sellers to distinguish their products are claimed
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Library of Congress Cataloging-in-Publication Data
Weiss, N. A. (Neil A.)
Introductory statistics / Neil A. Weiss; biographies by Carol A. Weiss. – 9th ed.
p. cm.
Includes indexes.
ISBN 978-0-321-69122-4
1. Statistics–Textbooks. I. Title.
QA276.12.W45 2012
519.5–dc22
Introductory.Statistics,.Neil.A..Weiss,.9ed,.AW,.2012.pdf
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