QTM 100 Lecture Notes - Lecture 3: Standard Deviation, Global Positioning System, Central Tendency

• School: Emory University
• Department: Quantitative Theory & Methods
• Course: QTM 100
• Professor: Jacobson Jeremy

Document Summary

Horizontal line displays range of values for the variable. For each observation, a dot is placed above its value on the number line. May be more useful for small data sets and less for large data sets. A vertical line separates the stem and the leaf. Stem: on the left side of the line on a stem and leaf plot; consists of all digits except the last one. Leaf: on the right side of the line on a stem and leaf plot; consists of the last digit of the numeric value. More useful for small data sets and less for large data sets. The horizontal line displays the range of values for the variable. The height of bars display the frequency or the relative frequency of occurrence (percent) for groups of values. More useful for large data sets and less for small data sets. The histogram shows 0-30, but it is really 1-29.