Records indicate that the mean weight of mature rainbow trout in Eagle Creek is 2.25 kg with a standard deviation of 0.53 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, σ , of weights has changed. To do so, you measure the weights of 16 randomly chosen mature rainbow trout from the creek and find that the sample standard deviation is 0.34 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 χ2 , the value of the test statistic for your chi-square test. Round your answer to three or more decimal places. =χ2
Records indicate that the mean weight of mature rainbow trout in Eagle Creek is 2.25
kg
with a standard deviation of 0.53
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, σ
, of weights has changed. To do so, you measure the weights of 16
randomly chosen mature rainbow trout from the creek and find that the sample standard deviation is 0.34
kg
.
Under the assumption that current weights of mature rainbow trout in the creek follow a
Find
χ2
, the value of the test statistic for your chi-square test. Round your answer to three or more decimal places.
=χ2
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