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![](/olcweb/styles/shared/spacer.gif) | ![Psychological Testing and Assessment Book Cover](/sites/dl/free/0767421574/title/cohen_swerdlik5esm.jpg) Psychological Testing and Assessment: An Introduction To Tests and Measurement, 5/e Ronald Jay Cohen Mark Swerdlik
A Statistics Refresher
Chapter Outline
Scales of Measurement Nominal Scales Ordinal Scales Interval Scales Ratio Scales Measurement Scales in Psychology |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | Describing Data Frequency Distributions Measures of Central Tendency The arithmetic mean The median The mode Measures of Variability The range The interquartile and the semi-interquartile range The average deviation The standard deviation and variance Skewness Kurtosis |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | The Normal Curve Area Under the Normal Curve |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | Standard Scores z Scores T Scores Other Standard Scores Normalized standard scores |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | CLOSE-UP The Normal Curve and Psychological Tests |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | EVERYDAY PSYCHOMETRICS Consumer (of Graphed Data), Beware! |
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