DrFowler Is Interested in Studying How Indoor Lighting Can Influence

question 64

Multiple Choice

Dr.Fowler is interested in studying how indoor lighting can influence people's moods during the winter.A sample of 100 households is selected.Fifty of the homes are randomly assigned to the bright-light condition where Dr.Fowler replaces all the lights with 100-watt bulbs.In the other 50 houses,all the lights are changed to 60-watt bulbs.After two months,Dr.Fowler measures the level of depression for the people living in the houses.In this study,the independent variable is the ____.

• A)​brightness of the lights
• B)​level of depression
• C)houses with 100-watt bulbs
• D)​houses with 60-watt bulbs

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Definitions:

Consumer Surplus

The gap between the total sum consumers are prepared and financially able to spend on a good or service and the sum they actually spend.

Legal

Pertaining to or conforming to the laws of a country or the legality of a situation or activity.

Efficient Output Level

The quantity of output at which a firm's average total cost is minimized.

Units

Basic quantities or measurements used as a standard to express the amount, level, or size of something.