Observational error (or measurement error) is the difference between a measured value of a quantity and its unknown true value. Such errors are inherent...

sample from its "true value" (not necessarily observable). The error of an observation is the deviation of the observed value from the true value of a...

the measure varies. The term margin of error is often used in non-survey contexts to indicate observational error in reporting measured quantities. Consider...

presence Naturalistic observation Observation unit Observational astronomy Observational error Observational learning Observational study Observable quantity...

Accuracy and precision are two measures of observational error. Accuracy is how close a given set of measurements (observations or readings) are to their...

conclusions from data that are subject to random variation (e.g., observational errors, sampling variation). Descriptive statistics are most often concerned...

common error). Independence of observational error from potential confounding effects. Exact or approximate normality of observations (or errors). Linearity...

considers only observational errors in the dependent variable (but the alternative total least squares regression can account for errors in both variables)...

In natural science and signal processing, an artifact or artefact is any error in the perception or representation of any information introduced by the...

In statistical hypothesis testing, a type I error, or a false positive, is the rejection of the null hypothesis when it is actually true. For example...