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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
You may use the calculator above and this area as scratch paper. To see the solution just click on the button.
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