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At one time, policymakers interpreted the Phillips curve as offering a menu of inflation-unemployment choices.Today, the curve is no longer viewed this way.Why has the interpretation changed?
Confidence Interval Estimate
An interval estimate is a range of values used to estimate a population parameter, typically defined by two numbers between which a population parameter is said to lie with a certain level of confidence.
Normally Distributed Populations
Populations in which the variables of interest follow a distribution that conforms to the properties of a normal curve, implying a symmetric distribution of data around the mean.
Independent Samples
Two or more groups of data that are collected from separate and unrelated populations, with each group not influencing the others.
Degrees of Freedom
How many separate values or measures could be allocated to a statistical distribution.
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