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9.1 – Sampling Distributions. Parameter – number that describes the population Statistic – number that describes a sample. Sampling Distribution Describe through SOCS Bias Unbiased – mean of sampling distribution is equal to the true value of the parameter being estimated.
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9.1 – Sampling Distributions • Parameter – number that describes the population • Statistic – number that describes a sample. • Sampling Distribution • Describe through SOCS • Bias • Unbiased – mean of sampling distribution is equal to the true value of the parameter being estimated. • Large samples are less likely to contain bias • Variability of a Statistic – described by the spread of its sampling distribution. • Larger samples give smaller spread.