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.

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.

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Answer 2

Hunter Aldridge

Age is typically considered a discrete variable. This is because age is commonly measured in whole numbers (years) and is usually counted in specific units (e.g., years, months, days). Even though age can technically be measured with great precision (e.g., down to fractions of a second), in most practical contexts, it is treated as a discrete variable due to the way it is commonly quantified and categorized.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.