A researcher has numbered all 100 cities in Maryland from 1 to 100 and has calculated a mean of 17.43 for the variable "city of death." Group of answer choices Since the variable is nominal, the mean makes no sense. The variable is interval-ratio and the mean is an appropriate and useful statistic in this case. Since this variable is discrete, the mean should not be computed. Since the variable is ordinal, we should treat the value of the mean with great caution