The answer in the space provided is the valid questionnaire. It is because a valid questionnaire is a type of questionnaire in which it measures a particular quantity, group or a particular thing that is related to their research. This type of questionnaire enables to promote the validity and reliability. It could be seen above that it is considered to be a valid questionnaire as it tries to measure something that is related to their research in which they will measure the population.
A(n) _____________ questionnaire measures what it was intended to measure in the population being assessed.