QMS 102 Midterm: Midterm Crib Sheet

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

Document Summary

Stem and leaf plot: each number is separated into a stem and leaf, similar to a histogram, contains original data values if possible. Rules and conventions: there is more than one set of rules. The purpose is to organize a small amount of data in an easy to understand diagram. Stems: should be from 6-13, should be consecutive numbers or repeated numbers; they may be repeated twice or. 5 times: units must be indicated if stem is not taken from face value, there must be at least one leaf associated with the first and last stem. Leaves: the leaf for each data value is the next single digit after the stem (1. 73 -> 1. 7). When the stems are repeated twice, the leaves 0-4 go with the first stem and the leaves 5-9 go with the second stem. Notation for indicating classes: and under , to 0-5 . Note: in this course, all classes must have the same class width.