A gym teacher observes each of his students hitting tennis balls with a racket at the beginning of class. He then instructs his students in how to effectively hit a tennis ball with a racket. At the end of class he observes each student hitting a tennis ball with a racket to see if his instruction made a difference. Use the above experiment to answer the following. Which is the treatment group? Group 1
Group 2
Neither group Both groups Which is the control group (if there is one)?
Group 1
Group 2
No control group Is this study blind, double blind, or neither?
Blind Double-blind Neither Which best describes this research?
Rigorously Controlled Design Matched Pairs Design
Randomized Block Design Randomized Two Treatment Experiment