Which is true about coefficient alpha?
A. It is a lower bound of a test of parallel items
B. It is an upper bound of a test of parallel items
C. It is an average of all combination of split-half reliabilities
D. It is independent of inter-item correlations
Choose the correct answer from the options given below:
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Correct answer: C. A and C only
Explanation
Coefficient alpha equals the mean of all possible split-half coefficients and is a lower bound to reliability; it depends on inter-item correlations.
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