BIOE 2365 Study Guide - Midterm Guide: Interquartile Range, Box Plot, Probability Plot
11 Oct 2016
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Each possible sample in n is equally likely to be picked. Probability of drawing an ace of hearts out of a deck w/random draw. Physical population: real, entirely present, can fit in one parameter, cannot make statements beyond population, ex. Conceptual: doesn"t ne(cid:272)essaril(cid:455) e(cid:454)ist, could exist in future or be hypothetical, use sample to make inferences, ex. All o rings made by a factory in five years. Standard deviation is square root of variance. Variability of scatter described by variance or stdev. Histogram: broken down into bins, frequency of falling into each bin, shows general shape of pdf. Box plot: show center, spread, departure from symmetry. Identify whisker, outlier, supreme outlier: median- divides data into two equally sized parts, four equal parts- quartiles. Quartiles are the points that separate the quarters. Interquartile range- q3-q1: whiskers- lines outside of the iqr. E(cid:454)tend to the furthest point within 1. 5iqr"s of end of the (cid:271)o(cid:454)
