BUS 082 Lecture Notes - Lecture 12: Box Plot, Quartile, Descriptive Statistics

• School: College of The Sequoias
• Department: Business (BUS)
• Course: BUS 082
• Professor: bettencourt

Document Summary

The extent to which the data values group together around a central value. = sum of all values / sample size. Can be effected by outliers, only useful for numerical data. If number of values is odd, median is middle. If even, median is average of two middle numbers. Geometric mean rate of change of a variable over time. = (x1 x x2 x x3 x xn)1/n. Geometric mean rate of return measures investment over time. = [(1 + r1) x (1 + r2) x x (1 + rn)]1/n 1. Rt is the rate of return in time period t. The amount of dispersion / degree of scattering around the central value. Gives information on the spread or variability of the data values. Ignores the way data is distributed and is sensitive to outliers. Average of squared deviations of values from the mean. S2 = (x1 mean)2 + (x2 mean)2 + (xn mean)2 / n-1.