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The population mean rushing yards gained in the 2 0 0 5 NFL season by runners with at least one attempt follows a normal distribution.
The population mean rushing yards gained in the NFL season by runners with at least one attempt follows a normal distribution. A random sample of size is taken from the list of all NFL runners in and the mean and standard deviation of and respectively. What is the approximate probability that the average yards gained for a sample of runners is between and yards?
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