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Sandra wants to do a random survey of households to get residents' opinions about crime. She takes out a map of the city, divides the city into four sections, and then takes a random sample of addresses from each area. What type of sampling is this?
Expected Value
A statistical measure that calculates the average outcome of a random variable or process, factoring in all possible values and their probabilities.
Efficient Allocation
The distribution of resources in such a manner that it's impossible to improve anyone's condition without worsening someone else's.
Risk Diversified
The strategy of spreading investments across various assets to reduce exposure to risk in any single area.
Expected Income
The amount of income an individual anticipates or forecasts to receive over a certain period.
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