Error and bias in under-5 mortality estimates derived from birth histories with small sample sizes

Table 2 Error metrics

Metric	Formula	Interpretation
Error	$\hat{q_{0}} - q_{0}$	Measure of bias, in absolute terms.
Relative error	$\frac{\hat{q_{0}} - q_{0}}{q_{0}}$	Measure of bias, in relative terms.
Absolute error	$\| \hat{q_{0}} - q_{0} \|$	Measure of the magnitude of the difference between the estimates and true mortality, in absolute terms.
Absolute relative error	$\|\frac{\hat{q_{0}} - q_{0}}{q_{0}}\|$	Measure of the magnitude of the difference between the estimates and true mortality, in relative terms.

ISSN: 1478-7954