Question

Is age a discrete or continuous variable? Why?

Answer 1

Discrete if measured in a number of years, minutes, seconds. However it would be continuous if measured to an exact amount of time passed since the start of something.

Explanation:

Age is measured in units that, if precise enough, could be any number. Therefore the set they come from is infinite. For example, someone could be `22.32698457` years old or `22.32698459` years old. We could be infinitly accurate and use an infinite number of decimal places, therefore making age continuous.

However, in everyday appliances, all values under `6` years and above `5` years are called `5` years old. So we use age usually as a discrete variable.