HP 4100 Lecture Notes - Lecture 3: Zip Code, List Of Order Structures In Mathematics, Categorical Variable

• School: App State
• Department: Health Promotion
• Course: HP 4100
• Professor: Christopher Shreve

Document Summary

Quantitative numbers (variables that have been measured with real numbers; real mathematical value): discrete or discontinuous: must be integers or whole numbers. Vital statistics such as births, deaths, marriages, divorces: continuous: age, height, weight, serum cholesterol, etc. ; data that can be represented in decimals, limited only by the accuracy of measurement. Histograms: graphs should be self-explanatory, with a descriptive title, labeled axes, and units of observation, the most common graph is the histogram (a pictorial representation of the frequency table). The frequency polygon is a line graph of the histogram, connecting the midpoints of each bar. Major difference is to start and end the line graph on the x axis: polygon shapes reveal much about the group from which the data were drawn. Visualize the polygon with the continuous variable (e. g. , age) on the x axis and the frequency count on the y axis). The bar chart is useful for displaying nominal or ordinal data.