QMS 102 Lecture Notes - Lecture 2: Ogive, Bar Chart, Treemapping

• School: Ryerson University
• Department: Quantitative Methods
• Course: QMS 102
• Professor: Fu

Document Summary

Summary table: tallies the frequencies or percentages of items in a set of categories so that you can see differences between categories. *a contingency table helps organize two or more categorical variables* Used to study patterns that may exist between the responses of two or more categorical variables. An ordered array is a sequence of data, in rank order, from the smallest value to the largest value. Shows range (minimum value to maximum value) The frequency distribution is a summary table in which the data are arranged into numerically ordered classes. You must give attention to selecting the appropriate number of class groupings for the table, determining a suitable width of a class grouping, and establishing the boundaries of each class grouping to avoid overlapping. The number of classes depends on the number of values in the data. With a larger number of values, typically there are more classes. In general, a frequency distribution should have at least.