A watch maker claims that the weekly error in their watches has standard deviation of 1s sample of 20 watches yields a sample standard deviation of S = 1.364 seconds. At the significance level, do the data support the hypothesis that the standard deviation of the v error of the watches exceeds the 1 second claimed by the manufacturer? Formulate and the appropriate chi-square test. The null hypothesis is

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A watch maker claims that the weekly error in their watches has standard deviation of 1 second. A
sample of 20 watches yields a sample standard deviation of
significance level, do the data support the hypothesis that the standard deviation of the weekly
error of the watches exceeds the 1 second claimed by the manufacturer? Formulate and carry out
s = 1.364 seconds. At the 1%
the appropriate chi-square test. The null hypothesis is
Ho .
o = 1
Again, include answers to a)-d) as in the previous hypothesis tests.
Transcribed Image Text:A watch maker claims that the weekly error in their watches has standard deviation of 1 second. A sample of 20 watches yields a sample standard deviation of significance level, do the data support the hypothesis that the standard deviation of the weekly error of the watches exceeds the 1 second claimed by the manufacturer? Formulate and carry out s = 1.364 seconds. At the 1% the appropriate chi-square test. The null hypothesis is Ho . o = 1 Again, include answers to a)-d) as in the previous hypothesis tests.
Your answer should include:
a) a statement of the hypotheses
b) the critical value for the test
c) the value of the test statistic
d) a statement of conclusion
Transcribed Image Text:Your answer should include: a) a statement of the hypotheses b) the critical value for the test c) the value of the test statistic d) a statement of conclusion
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