SOLUTION: a.What is the F critical value to be used at the 0.05 level of significance with 7 numerator degrees of freedom and 12 denominator degrees of freedom? b.What is the chi-square cri

Question 135535: a.What is the F critical value to be used at the 0.05 level of significance with 7 numerator degrees of freedom and 12 denominator degrees of freedom?
b.What is the chi-square critical value with 12 degrees of freedom for a 0.05 probability?
c.What is the exact probability of a value that fits a chi-square distribution with 17 degrees of freedom being higher than 30.995?
d.I have a sample of 13 units and I want to run a hypothesis test comparing the average to a set value. The hypothesis test uses an alpha of 0.05. What critical value would be used to compare the test statistic against?

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
a.What is the F critical value to be used at the 0.05 level of significance with 7 numerator degrees of freedom and 12 denominator degrees of freedom?
Ans: 2.9134
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b.What is the chi-square critical value with 12 degrees of freedom for a 0.05 probability?
Ans: 27.587
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c.What is the exact probability of a value that fits a chi-square distribution with 17 degrees of freedom being higher than 30.995?
Ans: 0.0019734752...
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d.I have a sample of 13 units and I want to run a hypothesis test comparing the average to a set value. The hypothesis test uses an alpha of 0.05. What critical value would be used to compare the test statistic against?
Sounds like a two-tail z-test with alpha=5%:
Critical value = +/-1.96
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If your text considers 13 units to be a small sample you may want
the crit. value for a two-tail t-test with alpha=5%:
Critical value = 2.179
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Cheers,
Stan H.

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