These data were prepared by American College Testing (ACT) based on a field test of the SCASS Performance Event.

Unit Name: Reaction Rates Unit Content: Physical Science Unit Theme: Change over Time

Unit Statistics: Event Score 0 1 2 3 4 N 42.00 55.00 24.00 9.00 9.00 N Mean Standard Deviation Standard Error 139.00 1.19 1.13 0.10