Final answer:
The statement that Stegosaurus is older than Tyrannosaurus is a relative age statement, denoting comparison without exact dates.
Step-by-step explanation:
The statement "Stegosaurus is older than Tyrannosaurus" is a relative age statement. This is because it is comparing the ages of two fossil organisms without providing a specific number of years (absolute age) that defines their ages. In paleontology, relative dating techniques are used to determine which of two fossils is older or younger by their position in rock layers. For instance, fossils found in lower rock layers are assumed to be older than those in higher layers. This practice is essential for understanding the history of life on Earth and can help calculate the rate of speciation of early organisms by examining the geological context of their fossils.