A study defines “regular attendance” as presence on at least 90% of scheduled school days. This statement is primarily a/an:

Correct answer: operational definition Defining “regular attendance” as at least 90% of scheduled days says exactly how the concept will be measured, which is an operational definition.

• theoretical framework A theoretical framework explains relationships among concepts.
• sampling criterion only This statement defines a measure, and it is not only a rule for selecting a sample.
• null hypothesis A null hypothesis states that there is no effect or difference.