Example of Quantiles and Measures of Location         3

    Frequency

    120 +  *
        |  *
        |  **
        | ***
     90 +*****
        |*****
        |*******
        |*******
     60 +*******
        |*********
        |*********
        |*********
     30 +************
        |************   *
        |**************** *
        |***********************  * *
        ---------------------------------------------------
         1234567891111111111222222222233333333334444444444>
                  0123456789012345678901234567890123456789=
                                                          5
         PPQ M  MQ                                        0
         511 e  e3      P     P
          0  d  a       9     9
             i  n       0     5
           M a
           o n
           d
           e

                             X Midpoint
 
 
                     P5  =  5TH PERCENTILE
                     P10 = 10TH PERCENTILE
                     P90 = 90TH PERCENTILE
                     P95 = 95TH PERCENTILE
                     Q1  =  1ST QUARTILE  
                     Q3  =  3RD QUARTILE