Question

We have conducted a t-test to determine if the hospital mean for DRG XXX is significantly...

We have conducted a t-test to determine if the hospital mean for DRG XXX is significantly different from the population mean for DRG XXX. The calculated t is -3.39 and the critical t is -1.96. In this case we - A. reject the null hypothesis B. fail to reject the null hypothesis C. conduct the test again because the results are inconclusive D. not enough information provided

Math   Statistics-And-Probability   
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Answer #1

H0: Null hypothesis: = Population mean for DRG XXX

HA: Alternative hypothesis: Population mean for DRG XXX

Calculated value of t = - 3.39

Critical value of t = - 1.96

Since the calculated value of t = - 3.39 is less than critical value of t = - 1.96, we reject the null hypothesis.

So, correct option is:

A.   reject the null hypothesis.

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