Question 322825
At 
 = .01, did she see a difference between the two treatments?
Hot Water Cold Water
Sample mean 5.50 4.85
Sample variance 2.60 2.00 
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The critical values for a 2-tail t-test with df= 12 = +-3.055
The test statistic for your data is 1.09
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Answer: A
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Cheers,
Stan H.
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A) No, because the test value –1.09 is inside the range (-3.055, 3.055).
B) No, because the test value –0.79 is inside the range (-3.055, 3.055).
C) Yes, because the test value –0.79 is inside the range (-3.012, 3.012).
D) Yes, because the test value –1.09 is outside the range (-3.012, 3.012).