16. What are statistical observ bservational error (or measurement error) is the difference between a measured value of a quantity and its true value. In statistics, an error is not necessarily a «mistake»

16. What are statistical observ bservational error (or measurement error) is the difference between a measured value of a quantity and its true value. In statistics, an error is not necessarily a «mistake». Variability is an inherent part of the results of measurements and of the measurement process.ation errorsO
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