N6208 Assignment 5
Chapter 5 Hypothesis Testing
Step 1: Specify the hypotheses (symbolically)
Null Hypothesis: _________________
Alternative hypothesis: ___________
α = 0.05 (two-tailed)
Step 2: Calculate the necessary statistics
SEM= 8.0 (SD) / 63 (n-1) = 0.127
√0.127= 0.356 (SD)
0.356 / √64
0.356 / 8 = 0.045
t = __________________
Step 3: Establish the critical value and region of rejection. (Drawing the picture helps you understand the process)
Step 4: Make a decision regarding the null hypothesis.
To run a one-sample t test, click Analyze→ Compare Means→ One-sample T test. In the dialog box that appears, insert the two SF-12 variables, which are at the end of the file, in the Test Variable(s) slot. At the bottom, enter the Test Value as 50.0. Click the Options pushbutton to make sure that you are requesting 95% CIs for the analysis. Then click Continue→ OK to run the analysis and answer these questions:
a. Write a research question for the physical health component score.
b. State the null and alternative hypothesis (non-directional) for the physical health component score.
c. What are the values of t for the two analyses?
d. Are these values statistically significant? If so, at what level of significance?
e. Write a few sentences to summarize the results.
f. Include your spss printout to your assignment.