Final answer:
The data from 1988 for houses sold in Andover is both relevant and insufficient.
Step-by-step explanation:
The question asks whether the data from 1988 for houses sold in Andover is relevant, irrelevant, insufficient, or both relevant and insufficient. The answer is that it is both relevant and insufficient. It is relevant because it provides information about houses sold in Andover in 1988, which could be useful for studying trends or making comparisons. However, it is insufficient because it only provides data from one year and may not be representative of long-term trends or the current housing market.