Professor Middlebrain Notes That Rats in the First 10 Cages

question 94

Multiple Choice

Professor Middlebrain notes that rats in the first 10 cages, which were injected with salt water, are calm. Rats in the last 10 cages, which were injected with distilled water, are aggressive. He concludes that salt decreases aggressiveness. What is wrong with this study?

• A) lack of random assignment
• B) lack of an independent variable
• C) lack of a dependent variable
• D) presence of demand characteristics

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Definitions:

Capital Lease

A lease agreement that is recorded as an asset on a lessee's balance sheet, signifying that the lessee has substantially all the risks and rewards of ownership.

Delivery Truck

A vehicle designed for transporting goods from one location to another.

Vehicles Account

An account used in accounting to track the cost and depreciation of a company's vehicles.

Land Improvements

Enhancements made to land such as landscaping, fencing, and paving, which extend the use and increase the property value.