GGR270H1 Lecture : ggr270 lecture sept 28
Document Summary
Mean most common measure of central tendency it is the sum of all values divided by the number of observations sample measurement. Median: value occupying the "middle position" of an ordered set of observations order of the observations, lowest to highest and find the middle position. 0. 5(n+1) uneven observations: odd number of observations even observations: use the same formula but you"ll have to add the two and divide it by two. Mode: value that occurs at the highest frequency allows you to locate the peak of a relative frequency histogram. Mean is usually the best but it is not the best when the distribution is bi-modal and is not good with outliers which skew the distribution. Measure of dispersion range: simplest measure takes difference between smallest and largest value in the dataset is influence by outliers range = xmax - xmin.
