Chapter 7 4) According to a report by the U.S. Fish and Wildlife Service, the mean length of six-year-old rainbow trout in the Arolik River in Alaska is 479 millimeters with a standard deviation of 41 millimeters. Assume these lengths are normally distributed. (a) What proportion of six-year-old rainbow trout are less than 451 millimeters long? (b) What proportion of six-year-old rainbow trout are between 420 and 518 millimeters long? (c) Is it unusual for a six-year-old rainbow trout to be less than 412 millimeters long?-

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Chapter 7
4) According to a report by the U.S. Fish and Wildlife Service, the mean length of six-year-old
rainbow trout in the Arolik River in Alaska is 479 millimeters with a standard deviation of 41
millimeters. Assume these lengths are normally distributed.
(a) What proportion of six-year-old rainbow trout are less than 451 millimeters long?
(b) What proportion of six-year-old rainbow trout are between 420 and 518 millimeters long?
(c) Is it unusual for a six-year-old rainbow trout to be less than 412 millimeters long?-
Transcribed Image Text:Chapter 7 4) According to a report by the U.S. Fish and Wildlife Service, the mean length of six-year-old rainbow trout in the Arolik River in Alaska is 479 millimeters with a standard deviation of 41 millimeters. Assume these lengths are normally distributed. (a) What proportion of six-year-old rainbow trout are less than 451 millimeters long? (b) What proportion of six-year-old rainbow trout are between 420 and 518 millimeters long? (c) Is it unusual for a six-year-old rainbow trout to be less than 412 millimeters long?-
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