Probability that sample mean for thirty days is in range

Reference no: EM13128006

The NDSU library checks out an average of 320 books per day, with a standard deviation of 75 books. Suppose a simple random sample of 30 days is selected for observation. What is the probability that the sample mean for the 30 days will be between 300 and 340 books?

Reference no: EM13128006

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