Categorize these measurements associated with student life according to level: nominal, ordinal, interval, or ratio.

(a)Length of time to complete an exam: nominal ordinal interval ratio

(b)Time of first class: nominal ordinal interval ratio

(c)Major field of study: nominal ordinal interval ratio

(d)Course evaluation scale: poor, acceptable, good nominal ordinal interval ratio

(e)Score on last exam (based on 100 possible points): nominal ordinal interval ratio

(f)Age of student: nominal ordinal interval ratio