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.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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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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