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Consider a sample of days of operation

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A Newspaper store checks out an average of u = 320 papers per day, with a standard deviation of ó=75 newspapers. Consider a sample of 30 days of operation, with x being the sample mean number of newspapers checked out per day.

  • What is the shape of the sampling distribution of x? Why?
  • What is the standard deviation of x?
  • What is the probability that the sample mean for the 30 days will be between 300 and 340 newspapers?
  • What is the probability the sample mean will show 325 or more books checked out?

Reference no: EM131725955

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