Posted by **Brad** on Friday, June 10, 2011 at 5:46pm.

The wildlife department has been feeding a special food to rainbow trout fingerlings in a pond. A sample of the weights of 40 trout revealed that the mean weight is 402.7 grams and the standatd deviation 8alE8 gr. What is the probability that the mean weight for a sample of 40 trout exceeds 405.5 grams?

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