# We can work on Validity and Reliability

Use the Chapter Seven dataset for these problems.
Run an Exploratory Factor Analysis using the extraction method of principal axis factoring as demonstrated in
problem 7.3. Run the factor analysis on the 13 items related to stress. In the extraction window request âfixed
number of factors to extract as â2â
What is the value KMO and Bartlettâs Test? What does this value tell you?
Paste a copy of the Rotated Factor Matrix. What items contribute to construct 1 (stress). What items contribute
to construct 2?
How would you evaluate the validity of these survey items?
Run Cronbachâs alpha for the five happiness scale items. Follow the procedures in Problem 7.4
What is the Cronbachâs Alpha value? What does it mean?
Are the items on the Inter-Item Correlation Matrix correlated positively and above .40? List the correlations
from the matrix.
Comment on the Corrected Item Correlation Table. Explain what it means.
Comment on the Cronbachâs Alpha if Item Deleted Table. Explain what it means

Sample Solution