ADMS 2320 Chapter Notes - Chapter 4: Level Of Measurement, Variance, Standard Deviation

• School: York University
• Department: Administrative Studies
• Course: ADMS 2320
• Professor: all

Document Summary

Range, standard deviation, variance, coefficient of variation. The arithmetic mean, a. k. a. average, shortened to mean, is the most popular & useful measure of central location. It is computed by simply adding up all the observations and dividing by the total number of observations: Mean = sum of the observations/number of observations. You can calculate arithmetic mean for population as well as for sample. When referring to the number of observations in a population (as a whole), we use uppercase letter n. When referring to the number of observations in a sample, we use lower case letter n. The arithmetic mean for a population is denoted with greek letter mu : . The arithmetic mean for a sample is denoted with an x-bar : Population sum all x for 1 to n i. e. 5 8 6 9 10 4. 6 over sum xi = x1+, x2+, x3++x6 i=1. A set of data has only one median.