Data Collectionmedium
0:00.0
A high school identified the 15 students who scored lowest on a standardized math test and enrolled them in an intensive tutoring program. On the next administration six months later, this group's average score improved significantly. Which of the following is a valid statistical explanation for the improvement independent of tutoring effectiveness?
A high school identified the 15 students who scored lowest on a standardized math test and enrolled them in an intensive tutoring program. On the next administration six months later, this group's average score improved significantly. Which of the following is a valid statistical explanation for the improvement independent of tutoring effectiveness?