Vincente intends to examine differences between three groups of district curriculum coordinators that received either no formal training, a web-based training, or a cooperative group experience as instruction for the core standards. He tested participants' knowledge of the standards both before treatment and then after treatment. Given his design, which of the following analysis should Vincente conduct?
A) The t test for independent samples
B) The t test for nonindependent samples
C) ANCOVA
D) ANOVA

Question

Quizplus · Accepted Answer

ANCOVA (Analysis of Covariance) is the appropriate analysis for Vincente's study because it allows for the comparison of the three groups while controlling for initial differences in participants' knowledge of the standards (the pre-test scores). This method adjusts the post-test scores based on the pre-test scores, providing a more accurate analysis of the treatment effects.

Vincente Intends to Examine Differences Between Three Groups of District