Question 139471: need help with these problems.
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?
3.5747
You can find these values by using Google; look for statistics F distribution
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b. What is the chi-square critical value with 12 degrees of freedom for a 0.05 probability?
You didn't say if it is a one tail or two tail test.
If 2-tail you get 4.4004 and 23.337
If 1-tail you get either 5.226 or 21.026
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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?0
Ch-Sq(30.995,100,17) = 0.01999...
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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?
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Ho: u = set value
Ha: u is not equal to set value
Crit value for 2-tail test with alpha = 5% and df = 12: t = +/- 2.179
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Cheers,
Stan H.
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