OIS 2340 Lecture Notes - Lecture 3: Central Tendency

• School: University of Utah
• Department: Operations & Information Systems
• Course: OIS 2340
• Professor: Bullough

Document Summary

Measures of central tendency: measures that describe what is happening at the middle of our data set. Population mean equation: = refers to sum of the values of all the data points in a population. N is the number of items in the population. Sample mean equation: = n is the number of items in the sample. Inside the parentheses: select over the entire range of data. Remember the shortcut control-shift-down will select from the first number to the last number in a column. The most commonly occurring value in a data set. There may be no mode, one mode, or more than one mode in a data set. A data set with exactly two modes: bimodal. A data set with more than two modes: multimodal. Select multiple cells and type in the function. Click control-shift-enter when you are finished typing in the function.