STATS 10 Lecture Notes - Lecture 6: Shoe Size, Unimodality, Scatter Plot
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Show less detail, just key points: min (may be an outlier, q1, median, q3, max (may be an outlier, outliers. Also shows whiskers that extend to the largest/smallest points that are not outliers. Invisible boundaries that separate outliers from the rest: upper fence = q3 + 1. 5(iqr, lower fence = q1 1. 5(iqr) Whisker goes to largest/smallest that is not an outlier. It does not necessarily go to the fence. Can show if distribution is symmetric/skewed i. e. right whisker is longer than left whisker = right skewed cannot show us if distribution is unimodal or bimodal, etc. Boxplots strengths: allows for comparisons between groups less cluttering details. Width of box shows spread: greater width = larger spread. Describing the relationship between 2 numeric variables. Looking at certain species of snake comparing length (x) and weight (y) length. 8 is there a relationship between the length of a snake and its weight? weight. Yes, we expect longer snakes to weigh more.
