A Researcher Carries Out a Study Examining the Effects of a New

question 56

Multiple Choice

A researcher carries out a study examining the effects of a new science program on scores on a standardized science test. He chooses two seventh-grade classes to carry out the study. After the study is done, he finds that group who received the new program performed better than the control group. He also discovers, however, that the group he chose to receive the new program had better prior science achievement. In this study, the dependent variable in this study is:

• A) Prior science achievement
• B) The type of science program
• C) Standardized science test scores
• D) Seventh Grade

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Definitions:

Brake Free Stroke

The distance or movement a brake lever or pedal undergoes before the brake mechanism engages and begins to apply stopping force.

Air Compressors

Mechanical devices that increase the pressure of air by reducing its volume, commonly used in various industrial and personal applications.

Truck Air Brake Systems

A braking system used in heavy trucks and buses that uses compressed air to press brake pads against drum or disc brakes.

Trailer Hand Brake Valve

A manually operated valve located within reach of the driver or operator to apply the brakes on a trailer independently.