SOLUTION: A researcher calculates a t-test with a sample of 200 defense attorneys and the t-test yields a t value of �2.432. Is this finding significant at a .05 critical region? Are

Question 288298: A researcher calculates a t-test with a sample of 200 defense attorneys and the t-test yields a t value of �2.432.

Is this finding significant at a .05 critical region?
Are the results still significant if the researcher changes her critical region to .01?

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A researcher calculates a t-test with a sample of 200 defense attorneys and the t-test yields a t value of �2.432.
Is this finding significant at a .05 critical region?
Are the results still significant if the researcher changes her critical region to .01?
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If I assume the test is left-tail, the p-value is tcdf(-100,-2.532 with df=199)
= 0.007 which is significant at the 5% and at the 1% level.
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If I assume the test is two-tailed, the p-value is twice the previous,
or 2*0.007= 0.01559.. which is significant at the 5% but not the 1% level.
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Cheers,
Stan H.
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