HP 300s Scientific Calculator - Manual (Page 56)

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 (STAT)  (Edit)  (Ins)
        

Edit the FREQ data to the following:
{1,2,1,2,2,2,3,4,2,1} (FREQ:ON)
  (STAT)  (Data) 
       
       

Examples:
Calculate the sum of squares of the sample data and sum of
the sample data.
  (STAT)  (Sum)
 ( ) 
 (STAT)  (Sum)
 ( ) 
Calculate the number of samples, mean, and population
standard deviation.
  (STAT)  (Var)
x  2
x 