Organizing Data Sets

Formulas

Sample Mean     

Sample Variance:  2 different methods 

(both methods will give you approximately the same answer)

Long Method                            Short-cut Method

Sample Standard deviation (2 different methods)

Long Method                            Short-cut Method

Practice Problems for Organizing Data Sets

Graphical Approach

Bar graphs                     Histograms                        Box-plots

Numerical Approach

Sample Mean    Sample Median   Sample Mode    Sample Variance/Standard Deviation 

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