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Hypothesis testing problems

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1) What are the five steps involved in classic hypothesis testing?

2) In general, what is a "Critical Value" or "Cut-Off Score" of a test statistic?
What are the critical values of z for a two-tailed test (.05)?
What are the critical values of z for a one-tailed test (.05)?
What are the critical values of z for a two-tailed test (.01)?

3. a) I measure writing ability in 4th year students at Cosmopolitan and compare those measures with those of 1st year students. What is my Null Hypothesis?

b) I measure Life Satisfaction in a group of cancer survivors and compare their Life Satisfaction scores with those from a people who did not contract cancer.
What is my Null Hypothesis?

4. When we reject the null hypothesis, what are we rejecting? (Hint: Do NOT say that you are rejecting the Null Hypothesis.)

5. What are alpha ( α ) and beta ( β )?

6. I am conducting an experiment that examines learning as a function of study time. One group studies 5 minutes and the other group studies 7 minutes. When I look at my data, I CANNOT reject the Null Hypothesis. What can I do to get more power

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Solution Summary

The solution provides step by step method for the calculation of test statistic for various hypothesis testing problems . Formula for the calculation and Interpretations of the results are also included.

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See Also This Related BrainMass Solution

One and Two Tailed Tests: Hypothesis Testing Problem

Ho: u = 50
H1: u not = 50
The sample mean is 49, and the sample size is 36. the population standard deviation is 5. Use the .05 significance level.

a. Is this a one or two tailed test.
b. What is the decision rule?
c. What is the value of the test statistic?
d. What is your decision regarding Ho?
e. What is the p-value? Interpret it.

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