In an aquaculture study, the following variables were measured on each fish: sex, initial weight(g), body temperature (rC), weight gain(g). The scale of these four variables (in order) are:
1) (a) Nominal, ratio, ratio, ratio
2) (b) Nominal, ratio, interval, interval
3) (c) Ordinal, ratio, interval, ratio
4) (d) Nominal, ratio, interval, ratio
5) (e) Ordinal, interval, ratio, interval
