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A statistics teacher is triing to predict the grades on the fourth test so he could have the fun of finding the r.m.s. for prediction and then the actual scores. He predicts 30,35,45,50,50,70. The actual scores are 20,25,30,40,45,55. Which one of the following are true?
  • the r.m.s. of the prediction is larger
  • the r.m.s. of the actual is larger
  • the r.m.s.'s are equal
  • not enough info given to figure out r.m.s.
  • none of the above are true
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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