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SUSAN A. NOLAN Associate Dean of Graduate Studies for the College of Arts and Sciences, as well as an Associate Professor of Psychology, at Seton Hall University, New Jersey, USA. She has served as a statistical consultant to researchers at several universities, medical schools, corporations, and non-governmental organizations. THOMAS E. HEINZEN Based at William Paterson State University, New Jersey, USA. He has been awarded various teaching honours while continuing to write journal articles, books, plays, and two novels that support the teaching of general psychology and statistics.

An Introduction to Statistics and Research Design Frequency Distributions Visual Displays of Data Central Tendency and Variability Sampling and Probability The Normal Curve, Standardization, and z Scores Hypothesis Testing with z Tests Confidence Intervals, Effect Size, and Statistical Power The Single-Sample t Test The Paired-Samples t Test The Independent-Samples t Test Between-Groups ANOVA Within-Groups ANOVA Two-Way Between-Groups ANOVA Correlation Regression Chi-Square Tests Nonparametric Tests with Ordinal Data