Which of the following is an example of ratio data?

Ratio data is characterized by the presence of a true zero point and the ability to perform a wide range of mathematical operations, including addition, subtraction, multiplication, and division. In this case, population count is a clear example of ratio data because it can have a value of zero, which indicates the absence of people, and you can meaningfully compare counts, such as saying that a population of 200 is twice as large as a population of 100. This allows for a variety of analytical approaches and statistical calculations.

In contrast, temperature in Celsius does not have a true zero point in the same sense; zero degrees does not indicate the absence of temperature but rather a specific point on the scale. Ranking of cities does not qualify as ratio data since rankings are ordinal and do not provide information about the magnitude of differences between ranks. Categories of land use represent nominal data that classify observations into distinct groups without any inherent order or quantitative relationship.