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Homework Help: Urgent: homogenity of variances of equal sized populations

  1. Mar 8, 2008 #1
    1. The problem statement, all variables and given/known data

    Dear All,

    I have an urgent probability question. It goes as follows:

    A chemical tanker spills some chemicals near a coast. A survey team from the local University arrives at the scene and does some measurements.

    They can 20 samples at 3 different distance from the beach. In the measuring the take into account distance from spill, concentration of chemical and number of effected wildlife in the area.

    My teacher calls the 3 test sites for observations sites, and wants to show socalled equality of variances between the 3 sites.

    My question is how do I show equality of vaiances?

    Is it this formula that I use:
    http://www.le.ac.uk/bl/gat/virtualfc/Stats/variance.html [Broken]

    Best Regards
    Hummingbird.
     
    Last edited by a moderator: May 3, 2017
  2. jcsd
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