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In order to have a positive correlation:
  • the number must be between -1 and 1
  • the cloud of points must slope up
  • all options are correct
  • as one variable increase so must the other
  • the cloud of points must be football shaped
  • *****
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    Carlos Rodriguez <carlos@math.albany.edu>
    This problem was contributed by a student in Elementary Statistics. It is offered as it is with no warranty of any kind
    Last modified: Wed May 13 12:29:11 EDT 1998