A New Type of Pain Reliever Is Administered to 30

question 30

Multiple Choice

A new type of pain reliever is administered to 30 consenting post-operative patients in various hospitals.Although the pain reliever has already been tested for safety and effectiveness,this experiment is to observe and categorize any side-effects.Because of maturity and body mass,it is decided to test the adults separately from the children.
The grouping of the adults separate from the children is an example of what?

• A)Stratifying
• B)Controlling
• C)Matching
• D)Reduction of confounding factors
• E)Blocking

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Definitions:

Discount Retailers

Stores that offer products at lower prices by accepting lower margins in return for a high sales volume.

Arbitrage

The practice of taking advantage of price differences between markets to make a profit.

Vertical Contracts

Agreements between firms at different levels in the supply chain (e.g., manufacturer and retailer) to govern the terms of sale or purchase.

Costly Activities

Actions or processes that require a significant amount of resources, such as time, money, or effort.