DrWelsh Is Doing Experiments Using Drugs

question 7

Multiple Choice

Dr.Welsh is doing experiments using drugs.He is concerned that his subjects will respond to demand characteristics.He may want to control for this by using which of the following?

• A)stratification
• B)two independent variables
• C)a placebo
• D)randomization

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Definitions:

Endplay Gauge

A tool used to measure the axial movement or clearance in mechanical components.

Dial Indicator

A precision measurement tool used to measure small distances or angles with high accuracy, often in mechanical engineering.

Rotary Flow

Fluid movement such as that produced by a paddle wheel in water, or propeller in air, that results in centrifugal force. See rotary oil flow.

Oil Flow

The movement of oil through an engine or system to lubricate, cool, and clean internal components.