# Chapter Two

 What are the Measures of Central Tendency? Mode, Median, and Mean What is the Mode of a data set? The value that occurs most often Not every data set has a mode.The Mode is not very stable, changing just one number in a data set can change the Mode dramatically. What is the central value of an ordered distribution? The medianTo find it: Order the dataFor an odd number of data values in the distribution: Median + Middle data valueFor an even number of data values in the distribution: Sum f middle two values/2 = MedianFor an ordered data set of size n: Position of the middle value = n+1/2 What is the avearge that uses the exact value of each entry called? The MeanTo compute the Mean: Mean = Sum of all entries/Number of entries What is the notation used to indicate the sum of all data? X What is the symbol used to represent to sum all the entries in the distribution? summation symbol What is the Range? The difference between the largest and smallest values of a data distribution. Authordcahill6 ID101144 Card SetChapter Two DescriptionMCC/Keating Updated2011-09-12T01:00:54Z Show Answers