For which (if any) of the three dependent variables in this data set (gender, age, ethnicity) would you report the standard deviation?

 For which (if any) of the three dependent variables in this data set (gender, age, ethnicity) would you report the standard deviation?

A. Age, since it is measured on an interval scale

B. Gender, since it is measured on a nominal scale

C. Ethnicity, since it is measured on an interval scale

D. All of the above

E. None of the above, since the standard deviation is inappropriate to use for all three variable