Posted by **Terra** on Monday, November 16, 2009 at 7:54pm.

Suppose that the average grade for all people who take this course in statistics is 83 with a standard deviation of 3.5. If your particular class has an average of 89, can you conclude that your class is better than average at the 90 percent confidence level?

Identify one or two-tailed

States the Null and Alternative Hypothesis

States the Level of Significance

Calculates Test Statistic

Formulates Decision Rule

Makes a Conclusion

- Hypothesis -
**PsyDAG**, Monday, November 16, 2009 at 11:30pm
You need to consult your statistics text for the methods involved. However, I will start you out.

Since you are only concerned with whether the class (mean 2) scored higher, it is a one-tailed test.

Ho: mean 1 = mean 2

H1: mean 1 < mean 2

I'll leave the rest to you.

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