(Answered) According to a report by the us fish and wildlife service

Statistics

According to a report by the US Fish and Wildlife Service, the mean length of six-year-old rainbow trout in the Arolik River in Alaska is 481 millimeters with a standard deviation of 41 millimieters. Assume the lengths are normally distributed. What proportion of six-year-old rainbow trout are less than 450 millimeters long?

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