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Stats Ch 5

Standardizing The process of eliminating units in order to compare and combine original variables that have different units and magnitudes.
Standardized Value A value found by subtracting the mean and dividing by the standard deviation.
Normal Model A useful family of models for unimodal, symmetric distributions.
Parameter A numerically valued attribute of a model, not data.
Statistic A calculated value from data to summarize aspects of the data, not based on a model.
z-score A number using a standardized value telling how many standard deviations a value is from the mean.
Standard Normal model N(0,1)
Nearly Normal Condition This can be assumed if a histogram of the data shows a distribution that is both unimodal and symmetric.
68-95-99.7 Rule The percents between +/- 1, +/- 2, and +/- 3 standard deviations from the mean.
Normal Percentile Corresponds to the z-value giving the percentage of values in a Normal distribution found at that z-score or below.
Created by: HowardGeometry