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help for zdemo2
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Display 2 normal distributions 
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 zdemo2 mean1 sd1 mean2 sd2

Description
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zdemo2 displays two standard normal distributions each
       with their own mean and standard deviation.

Example
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 . zdemo2 50 5 60 10

Author
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      Philip B. Ender
      UCLA Department of Education
      UCLA Academic Technology Services
      enderatucla.edu