Six months after a devastating earthquake, a researcher goes back and examines archival data (sales records, etc.) that indicate how prepared residents in the area were for a disaster before the earthquake hit unexpectedly. The researcher then gathers data on how prepared residents are for a disaster six months later and compares the scores. This study is an example of a(n) .

This study is an example of an interrupted time series analysis.

Explanation:

A quasi-experiment is a type of research that does not use random variables and whose purpose is to establish a relationship of cause and effect. Regarded as the strongest quasi-experiment design, an interrupted time series analysis occurs when data is collected at regular intervals during a period of time. In the example given in the question, the researcher collects data, waits six months, then collects data again with the purpose of comparing the scores.

i do believe   by (keeping an organized record of all sources he or she referenced)good luck.

explanation:

sounds good to me mate!