STAT 206 Lecture Notes - Lecture 2: Frequency Distribution, Ogive, Supreme Headquarters Allied Powers Europe
Document Summary
Stat 206: chapter 2 (organizing and visualizing variables) Bar chart, pie chart, pareto chart, side-by-side bar chart (2. 2) For numerical variables (array), ordered array, frequency distribution, relative frequency distribution, percentage distribution, cumulative percentage distribution (2. 3) Stem-and-leaf display, histogram, polygon, cumulative percentage polygon (2. 4) Must identify variable type to determine the appropriate organization and visualization tools. Summary table- shows values of the data categories for one variable and the frequencies (counts) or proportions/percentages for each categories. Contingency table- shows values of the data categories for more than one variable and the frequencies or proportions/percentages for each of the joint responses. Each response counted/tallied into one and only one category/cell. Example (problem 2. 2, p. 40): the following data represent the responses to two questions asked in a survey of 40 college students majoring in business: What is your major? (a=accounting; c=computer information; m=marketing) Now to combine the two variables (gender and major):