In the classic study by Piliavin et al. (1969) investigating helper behaviour, observers recorded the latency (the time elapsed in seconds) from when the victim collapsed until the first passenger offered assistance. What level of measurement is this latency data?
Interval\text{Interval}Interval
Ordinal\text{Ordinal}Ordinal
Ratio\text{Ratio}Ratio
Nominal\text{Nominal}Nominal