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z-score
measure of how far a score is from the mean (in units of standard deviations)
68-95-99.7
rule of thumb for area under the Normal model, within 1, 2, or 3 SD of the mean
nearly normal condition
is the distribution unimodal and roughly symmetric?
normal percentile
the area under the normal curve to the left of a z-score
outlier
extreme value in a distribution
left skewed
distribution with a tail that extends to the left
right skewed
distribution with a tail that extends to the right