When Brandon was told that he correctly answered 80 percent of the items on a math achievement test, he asked how his performance compared with that of the average test-taker. Brandon's concern was directly related to the issue of:.
a. standardization.
b. predictive validity.
c. reliability.
d. content validity.
e. factor analysis.

a. standardization.    

Explanation:

Standardization: In statistics or research methods, the term "standardization" is described as a phenomenon that examines objectivity and consistency of the way a particular test is being scored and administered. When an investigator wants to compare one participant with that of another participant on a particular test, then it is significant for the investigator to carry out the test under similar scoring procedure and condition.

In the question above, the given statement signifies that Brandon's concern was directly related to the issue of standardization.

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