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Starnes, UPDATED The Practice of Statistics, 6e, Chapter 7
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Terms in this set (8)
statistic
Number that describes some characteristic of a sample.
parameter
A number that describes some characteristic of a population.
sampling variability
The fact that different random samples of the same size from the same population produce different estimates.
sampling distribution
The distribution of values taken by a statistic in all possible samples of the same size from the same population.
unbiased estimator
A statistic used for estimating a parameter is unbiased if the mean of its sampling distribution is equal to the value of the parameter being estimated.
sampling distribution of a sample proportion ρ̂
The distribution of values taken by the sample proportion ρ̂ in all possible samples of the same size from the same population.
sampling distribution of a sample mean x
The distribution of values taken by the sample mean x in all possible samples of the same size from the same population.
central limit theorem (CLT)
In an SRS of size n from any population with mean µ and finite standard deviation σ, when n is sufficiently large, the sampling distribution of the sample mean x is approximately Normal.
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