MATH 1F92 Lecture Notes - Lecture 2: Squared Deviations From The Mean, Square Root, Standard Deviation
7 Oct 2016
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Middle of the main has to do with. Both histograms tend to have most of their values lying in the data set. This idea of how spread out the data is, Dispersion measures how far on average observations are from the mean. There are 3 types of dispersion in data: range. Example 1: find the range of the 8 math marks from the previous lesson. If we take each observation subtract it from the mean (that"s how much it deviates) and sum up each of these deviations i. e for population and for sample, we obtain 0. The greater observation values and the lower observation values will cancel each other out and the sum of the deviations will always be 0! A couple notes: standard deviation is just the _______________________ variance, population variance and standard deviation are divided by ____whereas the sample variance is divided by ______.
