STAT 100 Lecture 6: Lecture 6

• School: Simon Fraser University
• Department: Statistics
• Course: STAT 100
• Professor: Derek Bingham

Document Summary

Last day, looked at a variety of plots. For categorical variables, most useful plots were bar charts and pie charts. Key thing is to be able to quickly make a point using graphical techniques. Recall: a distribution of a variable tells us what values it takes on and how often it takes these values. Similar to a bar chart, would like to display main features of an empirical distribution (or data set) Essentially a bar chart of values of data: usually grouped to reduce jitteriness of picture, groups are sometimes called bins . Uses rectangles to show number (or percentage) of values in intervals. In a study of productivity, a large number of authors were classified according to the number of articles they published during a particular period of time. o s t n u o. Find minimum and maximum values of the data. Divide range of data into non-overlapping intervals of equal length.