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Records indicate that the mean weight of mature rainbow trout in Eagle Creek is 2.15 kg with a standard deviation of 0.48 kg. After years of marked oxygen depletion from pollutants in the creek, you want to perform a hypothesis test to see if the standard deviation, o, of weights has changed. To do so, you measure the weights of 15 randomly chosen mature rainbow trout from the creek and find that the sample standard deviation is 0.32 kg. Under the assumption that current weights of mature rainbow trout in the creek follow a normal distribution, you will perform a chi-square test. Find X, the value of the test statistic for your chi-square test. Round your answer to three or more decimal places.

Records indicate that the mean weight of mature rainbow trout in Eagle Creek is 2.15 kg with a standard deviation of 0.48 kg. After years of marked oxygen depletion from pollutants in the creek, you want to perform a hypothesis test to see if the standard deviation, o, of weights has changed. To do so, you measure the weights of 15 randomly chosen mature rainbow trout from the creek and find that the sample standard deviation is 0.32 kg. Under the assumption that current weights of mature rainbow trout in the creek follow a normal distribution, you will perform a chi-square test. Find X, the value of the test statistic for your chi-square test. Round your answer to three or more 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 13PPS
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Records indicate that the mean weight of mature rainbow trout in Eagle Creek is 2.15 kg with a standard deviation of 0.48 kg. After years of marked oxygen depletion from pollutants in the creek, you want to perform a hypothesis test to see if the standard deviation, ơ, of weights has changed. To do so, you measure the weights of 15 randomly chosen mature rainbow trout from the creek and find that the sample standard deviation is 0.32 kg. Under the assumption that current weights of mature rainbow trout in the creek follow a normal distribution, you will perform a chi-square test. Find x, the value of the test statistic for your chi-square test. Round your answer to three or more decimal places.
Transcribed Image Text:Records indicate that the mean weight of mature rainbow trout in Eagle Creek is 2.15 kg with a standard deviation of 0.48 kg. After years of marked oxygen depletion from pollutants in the creek, you want to perform a hypothesis test to see if the standard deviation, ơ, of weights has changed. To do so, you measure the weights of 15 randomly chosen mature rainbow trout from the creek and find that the sample standard deviation is 0.32 kg. Under the assumption that current weights of mature rainbow trout in the creek follow a normal distribution, you will perform a chi-square test. Find x, the value of the test statistic for your chi-square test. Round your answer to three or more decimal places.
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