Statistical Sciences 1024A/B Lecture Notes - Lecture 1: Squared Deviations From The Mean, Quartile, Categorical Variable
16 May 2016
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Chapter 1: picturing distributions with graphs: individuals: objects described by a set of data i. e. students dogs. M&m"s: variables: a characteristic of the individual. i. e. resting heart rate of an olympic runner today"s high temperature number of leaves on a tree sexual orientation, quantitative variable: numerical! i. e. age, height, etc. Bar charts: visual representation, used for categorical variables, more comprehensive. Pie charts: visual representation, used for categorical variables, less comprehensive: histograms: used for quantitative variables. Yields a bar graph that divides the variables into categories. Will demonstrate the overall pattern of the data (and detect outliers) Symmetric: both sides of the histogram mirror one another: stemplot/stem and leaf plot: Separate each observation into a stem, consisting of all but the (rightmost) digit, and leaf, the final digit. final. Leaf = only one digit: time plot: plot each observation against the time at which is was measured. Time on horizontal axis, variable on vertical axis.
