MS 150 Statistics Fall 2000 Quickie Quiz Five

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For the following questions, assume that the arrival times of customers at Dolokei-Palipoa sakau market on a Friday evening are normally distributed with a mean m of 7:00 P.M. and a population standard  deviation s of 30 minutes.

  1. ________ What percentage of customers have arrived by 7:00 P.M. or earlier?
  2. ________ What percentage of customers have arrived by 6:30 P.M. or earlier?
  3. ________ What percentage of customers arrive between 6:30 P.M. and 7:30 P.M.?

    For the following two questions, assume the total number of customers will be 60.
  4. ________ How many customers are at the market by 7:30 P.M.?
  5. ________ At 30 customers the owner, Mr. Rodriguez, will start a second stone.  What time will the second stone have to start?

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