OPRE 506
The owner of a fish market has a very peculiar assistant who has determined that the weights of catfish are normally distributed with a mean of 3.2 pounds and a standard deviation of .8 pound. If a sample of 25 fish yields a mean of 3.6 pounds, what is the z score for the observation?
- A. 18.750
- B. 2.50
- C. A gazillion.
- D. .750
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