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# Intro & Data

### Lesson 4 Quantitative Analysis (Population)

TermDefinition
Linear Method Uses the rate of growth (or decline) in a population over a period of time to estimate the current or future population
Exponential and Modified Exponential Method Uses the rate of growth (or decline) in a population over a period of time to estimate the current or future population
Step-Down (Ratio) Method Uses the ratio of the population in a city and a county (or a larger geographical unit) at a known point in time Such as decennial census
Symptomatic Method Uses available data to estimate the current population Correlation between population and other events (e.g. tax returns, school enrollment, etc.)
Distribution Housing Unit Method Census bureau data for the number of housing units. which is then multiplied by the occupancy rate and persons per household
Cohort Survival Method Uses the current population plus natural increase and net migration to calculate a future population
Trend Extrapolation Takes the past and projects it into the future Methods: Linear Exponential Gompertz
Gompertz A family of curves, describing demographic growth, that increase exponentially at first before reaching a plateau.
Allocation Methods Ratio Method (Step-Down) Distributed Housing Unit Method
Created by: amshinn18
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