Using an unbiased statistic guarantees that there will be no systematic tendency to under- or overestimate the value of the population characteristic and that estimates will almost always be relatively close to the true value.

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An unbiased statistic means that the expected value of the statistic equals the true population parameter, but it does not guarantee that individual estimates will be close to the true value; variability or sampling error can still result in individual estimates being far from the true value.

Using an Unbiased Statistic Guarantees That There Will Be No