Figure 1.
Estimated mean trajectories of students from the two cohorts (based on Model 2, lag-4 stabilizing banded covariance structure); markers annotated to indicate the grade-levels of the students.
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.