01:960:211 Lecture Notes - Lecture 4: Iqvia, Quartile, Box Plot
19 May 2016
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Document Summary
Range: of a set is given by the formula range = max min. Sample standard deviation: ( sx) is the standard deviation per a sample"s values, how far on average the observations are from the mean. Observe that s = (i {sample mean})) / (n -1) Where n is sample size and sample mean is the x with the line over it. Variation vs. standard deviation: the more variation there is in a set, the greater the value of standard deviation. Three standard deviations rule: almost all the observations of any set lie within three standard deviations to either side of the mean. Sum of squared deviations: subtract the mean from each observation, then square each value ==== numerator of the equation above. Chebyshev"s rule: 89% of the date lie within 3 standard deviations on either side of the mean.
