Stats 101 Certification Exam Questions and CORRECT Answers
z score formula(x-mean)/standard deviation z-scorea measure of how many standard deviations you are away from the norm (average or mean) normal distribution (bell curve)a symmetrical distribution with values clustered around a central, mean value Empirical RuleThe rules gives the approximate % of observations w/in 1 standard deviation (68%), 2 standard deviations (95%) and 3 standard deviations (99.7%) of the mean when the histogram is well approx. by a normal curve
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