frequency distributions

Giganews Newsgroups
Subject: frequency distributions
Posted by:  craigw
Date: Sun, 4 Jun 2006

this is a novice question....  I can't get excel to figure out the
descriptive statistics for a simple survey.  it goes like this.

The ages of newly hired, unskilled employees were grouped into the following
distribution:
    18 to 21      4
                21 to 24      8
    24 to 27      11
                27 to 30      20
                30 to 33      7
I just want to figure out the median age!  Help me please!!
        

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