Exhibit 12-1: Indicate Whether the Following Hypotheses Are Necessarily Ex

Exhibit 12-1: Indicate whether the following hypotheses are necessarily ex post facto research or possible to perform with experimental research.
-Refer to Exhibit 12-1.Students who use a computerized problem-solving tool will perform better on word problems than students who do not use the tool.

A) necessarily ex post facto research
B) possible to do with experimental research