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In a box that contains 30 cards each with a number. The Ave is 33 and the SD is 4. If the confidence level is 95.5% then what is the confidence interval.
  • confidence interval is between 29 and 37
  • confidence interval is between 25 and 41
  • confidence interval is between 27 and 39
  • confidence interval is between 30 and 36
  • confidence interval is between 23 and 43
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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