distribution of values taken by a statistic in all possible samples of the same size from the same population
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unbiased
If a statistic used to estimate a parameter is such that the mean if its sample distribution is equal to the true value of the parameter being estimated, what is the statistic said to be?
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the distribution of sample date
Has a mean that varies from sample to sample
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statistic
a number that describes some characteristic of the population
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parameter
a number that describes some characteristics of a sample
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