QMS 102 Study Guide - Quiz Guide: Bar Chart, Pie Chart, Contingency Table

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

Document Summary

Statistics: science of collecting, organizing, analyzing, and interpreting data to make informed decisions to make informed decisions. Inferential statistics: using data collected from small group to draw conclusions about a larger group. Variable: characteristic of an item (ex. weight or income) Data: the set of individual values associated with a variable. Parameter: a numerical measure that describes a characteristic of a population (ex. population mean) Sample: a portion of those in a population. Nominal: no specific order (ex. room numbers) Secondary data: collected from another source (data from reports) Contingency table: represents 2 or more categories of data. 6 to 13 and should be consecutive. At least 1 leaf for 1st and last stem. If stem (x1000) leaf (x100) or stem (x1) leaf (x1/10) Bar chart: shows category, length, frequency, percentage (vertical) Pie chart: circle broken up representing (good when comparing portion to total) Side by side chart: represents data from a contingency table.