Ch. 10: Summarizing the Data. Criteria for Good Visual Displays. Clarity Data is represented in a way closely integrated with their numerical meaning. Precision Data is not exaggerated. Efficiency Data is presented in a reasonably compact space. Frequency Distribution Example.
Variance: Mean of the squared deviations of the scores from its mean
Standard Deviation: Square root of the variance
Called the “unbiased estimator of the population value”
Standard Normal Distribution: Mean is set equal to 0, Standard deviation is set equal to 1