Which of the following best describes continuous data in biostatistics?

Continuous data in biostatistics is characterized by the ability to take on an infinite number of values within a given range. This means that such data can be subdivided into finer increments, allowing for a wide spectrum of possible measurements. For example, continuous data can include measurements like height, weight, temperature, or time, where values can be expressed with decimals, reflecting the precision of the measurement.

The other options do not accurately describe continuous data. Data without a meaningful zero qualifies as categorical or ordinal data rather than continuous data. Data restricted to whole numbers refers to discrete data, which cannot take on fractional values. Lastly, data that cannot vary would imply a constant, which contradicts the very nature of continuous data, where variability is inherent in its definition, as it reflects measurements that could change and that can be influenced by numerous factors.