S W 318 Lecture Notes - Lecture 3: Histogram, Bmw 1 Series, Bmw 3 Series
Document Summary
Circle graph that is divided as you would cut a pie or cake: segments add up to 100 , nominal or ordinal variables are things measured by pie charts. Categories are displayed as rectangles of equal width. Height is proportional to percentage of category. A map that shows geographical changes: population distribution, crime rates. Shows differences in percentages in categories of an interval-ration category. Width and height is proportional to category. Easy to compare female and male of a certain variable. Graph showing differences in interval ration variable category. Points represent frequencies of each category places about the midpoint of the category. Points are joined by a straight line. Graph displaying changes in different points in time. Percentages or rates are on the horizontal axis. Graphical distortion: unit of measure, can be stretched or shrunk. Comparisons among groups: bar chart, line graph, time series chart. Lose: potentially time, ability to see potential relationship, ability to examine numeric detail.
