Research Methodolgy

This is an electronic version of the print textbook. Due to electronic rights restrictions, some third party content may be suppressed. Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. The publisher reserves the right to remove content from this title at any time if subsequent rights restrictions require it. For valuable information on pricing, previous editions, changes to current editions, and alternate formats, please visit www.cengage.com/highered to search by ISBN#, author, title, or keyword for materials in your areas of interest.

Statistics for the
Behavioral Sciences

This page intentionally left blank

Statistics for the
Behavioral Sciences
Ninth Edition

Frederick J Gravetter
The College at Brockport, State University of New York

Larry B. Wallnau
The College at Brockport, State University of New York

Australia Brazil Japan Korea Mexico Singapore Spain United Kingdom United States

Statistics for the Behavioral Sciences,
Ninth Edition
Frederick J Gravetter and Larry B. Wallnau
Publisher: Jon-David Hague
Psychology Editor: Tim Matray
Developmental Editor: Tangelique Williams
Freelance Developmental Editor:
Liana Sarkisian
Assistant Editor: Kelly Miller
Editorial Assistant: Lauren K. Moody
Media Editor: Mary Noel
Marketing Program Manager: Sean Foy
Marketing Communications Manager: Laura
Localio
Content Project Manager: Charlene M. Carpentier
Design Director: Rob Hugel
Art Director: Pam Galbreath
Manufacturing Planner: Judy Inouye
Rights Acquisitions Specialist: Tom McDonough
Production Service: Graphic World Inc.
Text Designer: Cheryl Carrington
Text Researcher: Karyn Morrison
Copy Editor: Graphic World Inc.
Illustrator: Graphic World Inc.
Cover Designer: Cheryl Carrington
Cover Image: Edouard Benedictus, Dover
Publications
Compositor: Graphic World Inc.

© 2013, 2010 Wadsworth, Cengage Learning
ALL RIGHTS RESERVED. No part of

References: Ackerman, P. L., & Beier, M. E. (2007). Further explorations of perceptual speed abilities in the context of assessment P. A. (1998). Initial findings on the long term impact of Sesame Street and educational television for children: Arden, R., & Plomin, R. (2006). Sex differences in variance of intelligence across childhood. Bostrom, A., Freimer, N., & Gitschier, J. (2007). Science of the United States of America, 104, 14795–14800 Bartus, R. T. (1990). Drugs to treat age-related neurodegenerative problems: The final frontier of medical science? Journal of the American Geriatrics Society, Belsky, J., Weinraub, M., Owen, M., & Kelly, J. (2001). Boogert, N. J., Reader, S. M., & Laland, K. N. (2006). The relation between social rank, neophobia and individual learning in starlings. Behavioural Biology, 72, 1229–1239 Bradbury, T. N., & Miller, G. A. (1985). Season of birth in schizophrenia: A review of evidence, methodology, (1997). Effects of day care on the development of cognitive abilities in 8-year-olds: A longitudinal study. Journal of Personality and Social Psychology, 58, 1015–1026 Cohn, E. J., & Rotton, J. (2000). Weather, disorderly conduct, and assaults: From social contact to social