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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?     Round the answers to at least four decimal places.

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?     Round the answers to at least four decimal places.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 1GP
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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?

 

 

Round the answers to at least four decimal places.

 
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