ENVS178 Lecture Notes - Lecture 2: Summary Statistics, Negative Number, Watt
27 Feb 2016
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Symmetric: the feature on one side is the same as other side. Are these discrete or continuous variables? a) class size for first year courses at uw class size for first-year courses at uw: 25-400 b) distance to campus for first year students at uw (in km) If n observations are denoted by x1, x2, x3 xn their sample mean is: x 1 n xi . Follow these steps to identify which element in the ordered array is the median: Step 1: sort the data in ascending order (smallest to largest) Step 2: the sample median is the centre observation and is. / 2 observations from the even, the median is the found by beginning of the list. If n is average of two observations. counting n 1. Midran n e ge (i) can be calculated for any data set (ii) there is only one correct value (iii) takes into account every observation (iv) resistant to outliers.
