QMS 102 Lecture Notes - Lecture 2: Frequency Distribution

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

Document Summary

Stem rule 1: 6-13 items, if less then repeat numbers until stem values have reached 6-13. Lecture 2 notes items: make sure stem values are in consecutive order. If most of the data is at the lower half then it is positively skewed (skewed to the right) If most of the data is at the upper half then it is skewed to the left. Calculating the size: count the leafs and that"s the size of the data set. Is a summary table in which the data are arranged into numerically ordered classes: you should not have too few or too many classes. For the questions you will are called boundaries. solve in this course you should use 5-10 classes in your final constructed frequency distribution: notation: use the (cid:498)and under(cid:499) notation (cid:523)2(cid:888)0 and under 2(cid:889)0(cid:524). Class width is determined by the following formula: lower boundary of the next class): estimated class width = (cid:3046)(cid:3047) (cid:3048) (cid:3046)(cid:3047) (cid:3048)