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Quick Statistics Problem

  1. Oct 3, 2006 #1
    For a sample of 100 wheat fields, the mean yield was 10 tons/acre and the standard deviation 2. Approximately how many fields out of the 100 should have yields in the 8 to 12 ton range? Show work.
     
  2. jcsd
  3. Oct 4, 2006 #2

    HallsofIvy

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    But you haven't (shown your work, that is). What have you done on this? Do you know how to find the standard normal variable? Do you have a table of the normal probability distribution? If not, here's a good one on line:
    http://people.hofstra.edu/Faculty/Stefan_Waner/RealWorld/normaltable.html [Broken]
     
    Last edited by a moderator: May 2, 2017
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