Variation is the differences between individuals of the same species, caused by genetic and environmental factors. Surveys into variation give data that are continuous, which means to come in a range, ...

Forbes contributors publish independent expert analyses and insights. I help people communicate data clearly with graphs. I discussed whether zero needs to be included on all scales in a recent post, ...

This is a gradual change in a characteristic across a population, it could be human height, mass or shoe size. Continuous variation is represented as a histogram (no gaps between bars). A histogram ...