STAT 2040 Lecture Notes - Lecture 1: Interquartile Range, Average Absolute Deviation, Comma-Separated Values
16 Jan 2018
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Descriptive stats, graphical methods (chapter 2), and numerical measures (chapter 3) Calculate sample mean, standard deviation and variance on your calculator: stat mode on calculator, be sure to use the correct standard deviation function. Ex. larger data set: 799 nerve pulse intervals. Under data sets, stored as comma separated values (csv) file; comes from. Right skewed: tail of graph gets pulled out to the right side. Be careful when distinguishing between left and right skewed. Common measures: (arithmetic) mean, median and mode. Other measures exist, such as the geometric mean, harmonic mean and various trimmed means. Mean is the most widely used average but median is often used, particularly for skewed distributions. Others exist such as range, mean, absolute deviation, interquartile range. Define notation: variable x, observe (sample), values x, x1, x2 xn, n is sample size. 0 (this will always be zero- if it"s not you made a mistake)
