Examlex
The sidereal period is the time it takes the planet to complete one full orbit of the Sun relative to the very distant background stars.
Parameter
A characteristic or constant factor that defines or limits a system; in statistics, it is a numerical attribute of a population.
Unbiased Estimator
A statistic used to estimate a parameter that is expected to be equal to the true parameter of the population.
Population Parameter
A numerical characteristic or measure of an entire population, such as a mean (average), variance, or proportion.
Relative Efficiency
A measure comparing the precision or performance of two statistical estimators or methods.
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