Before publishing her test of musical aptitude, professor reed first administered the test to a representative sample of people. this was most clearly necessary for purposes of
a. standardization
b. reliability
c. predictive validity
d. content validity

a. standardization

Explanation:

Standardization means creating uniformity in scoring and administration of the test. In order to make effective comparison in scores from different people testing conditions must be kept uniform.

Standardization of a test is tested on a representative sample for which it is designed , the representative sample is used to determine the norms.

Norms for personality test are the same for aptitude test they have to correspond to the performance of the participants.

no one should discriminated against because he or she is not from a minority group

haile selassie i was the emperor of ethiopia from 1930-1974