Which of the following is a common example of ratio measurements?

Ratio measurements are characterized by the presence of a true zero point, allowing for meaningful comparisons of magnitude. Mass is a prime example of a ratio measurement because it can be measured in units such as grams or kilograms, and it has an absolute zero point where no mass exists. This means that one can say that an object with a mass of 6 kg is twice as heavy as one with a mass of 3 kg, allowing for direct comparisons and mathematical operations.

In contrast, temperature, while it can be measured, does not have a true zero in the Celsius or Fahrenheit scales, thus it is not a ratio measurement in a strict sense. Ranking involves ordinal data where the order matters but does not provide information about magnitude differences, and names fall under nominal data, which categorizes without any numerical measurement or order. Therefore, mass stands out as the only correct example of a ratio measurement among the choices provided.