Question 451288: I have a multiple choice question that I believe the answer is "E. None of the above" because my answer i keep getting doesn't match. I posted the question and the possible answers that it could be. Any help with this is greatly appreiated....
The net weights of a sample of bottles filled by a machine manufactured by Edne, and the net weights of a sample filled by a similar machine manufactured by Orno, Inc., are (in grams): Edne: 5, 8, 7, 6, 9 and 7 Orno: 8, 10, 7, 11, 9, 12, 14 and 9 Testing the claim at the 0.05 level the mean weight of the bottles filled by the Orno machine is greater than the mean weight of the bottles filled by the Edne machine, what is the critical value?
A. –1.96
B. –2.837
C. –6.271
D. +3.674
E. None of the above
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! The net weights of a sample of bottles filled by a machine manufactured by Edne, and the net weights of a sample filled by a similar machine manufactured by Orno, Inc., are (in grams):
Edne: 5, 8, 7, 6, 9 and 7
Orno: 8, 10, 7, 11, 9, 12, 14 and 9
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Testing the claim at the 0.05 level the mean weight of the bottles filled by the Orno machine is greater than the mean weight of the bottles filled by the Edne machine, what is the critical value?
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Ho: u(orno)-u(edne) <= 0
Ha: u(orno)-u(edne) > 0 (claim)
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I ran a 2SampleTtest against the data on my TI-84 and got the following:
test statistic: t = -1.1907
critical value: invT(0.95 with df = 5) = 2.0150
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I used df= 6-1 = 5
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You will get different answers depending on how
your text determines df for 2 independent samples.
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Cheers,
Stan H.
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A. –1.96
B. –2.837
C. –6.271
D. +3.674
E. None of the above
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