Quick Statistics Problem

  • Thread starter taffyleg
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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.
 

Answers and Replies

  • #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]
 
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