If anyone is able to provide some clarification here, I would be enormously grateful. I know I can compare the mean and median for a single distribution (this will help me ascertain if the distribution is skewed, for example, by comparing the mean to the median).

But I'm finding it difficult understanding whether I can compare the mean/standard deviation of one distribution/variable (e.g. INCOME) to the median and range of another distribution/variable (e.g. SOCIAL CLASS). Can I compare the standard deviation and range, for example, and say whether one of those variables is MORE or LESS dispersed than the other? Or am I comparing apples to oranges when comparing a standard deviation to a range?

Thanks again,

Frodo