(b) Test statistics
| TEFS Post-TEFS Pre | |
|---|---|
| Z | −2.889 |
| Asymp. significance | .004 |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.