Categorize these measurements associated with student life according to level: nominal, ordinal, interval, or ratio.(a)Length of time to complete an examnominalordinal intervalratio(b)Time of first classnominalordinal intervalratio(c)Major field of studynominalordinal intervalratio(d)Course evaluation scale: poor, acceptable, goodnominalordinal intervalratio(e)Score on last exam (based on 100 possible points)nominalordinal intervalratio(f)Age of studentnominalordinal intervalratio
Question
Categorize these measurements associated with student life according to level: nominal, ordinal, interval, or ratio.(a)Length of time to complete an examnominalordinal intervalratio(b)Time of first classnominalordinal intervalratio(c)Major field of studynominalordinal intervalratio(d)Course evaluation scale: poor, acceptable, goodnominalordinal intervalratio(e)Score on last exam (based on 100 possible points)nominalordinal intervalratio(f)Age of studentnominalordinal intervalratio
Solution
(a) Length of time to complete an exam: Ratio This is because it has a clear defined zero point (no time spent) and the intervals between different lengths of time are consistent.
(b) Time of first class: Interval This is because while there is a consistent interval between different times, there is no true zero point (the day does not start at the first class).
(c) Major field of study: Nominal This is because different fields of study cannot be ranked in a meaningful way, they are simply different categories.
(d) Course evaluation scale: poor, acceptable, good: Ordinal This is because while the categories can be ranked (good is better than acceptable, which is better than poor), the intervals between the categories are not necessarily consistent.
(e) Score on last exam (based on 100 possible points): Ratio This is because there is a clear defined zero point (no points scored) and the intervals between different scores are consistent.
(f) Age of student: Ratio This is because there is a clear defined zero point (birth) and the intervals between different ages are consistent.
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