Serial Killer The Murder Accountability Project has compiled a database of homicides in the United States from $1976-2017.$ This data set includes

record: ID of the incident given as an integer number

age of victim: in years

age of perpetrator: in years

sex: $1=$ female, $0=$ male

ethnicity of victim$($s$)$

ethnicity of perpetrator

weapon used

Which of the following variables is quantitative?

record

age of victim