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Self-selected samples have no bias because they are chosen by the people themselves.
Diet Pepsi
A low-calorie carbonated soft drink produced by PepsiCo, serving as an alternative to Pepsi with fewer calories.
Diet Coke
A calorie-free soft drink produced and distributed by The Coca-Cola Company, introduced as an alternative to regular Coca-Cola for health-conscious consumers.
Quantity Demanded
The total amount of a good or service that consumers are willing and able to purchase at a specific price in a given period.
Demand
The quantity of a good or service that consumers are willing and able to purchase at various prices during a specific time period.
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