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100 draws are made at random with replacement from box A, and 225 draws are made at random, independently, with replacement from box B. The standard deviation of box A is 5 and the standard deviation of box B is 10. What is the standard error for the difference between the average of the draws from the two boxes?
  • 2.5
  • 0.53
  • 1.2
  • 2.0
  • 0.84
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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