Table 5 Error of median prediction \(y - {\hat{Q}}(x, 0.5)\) (mean ± SD).
From: Estimation of cardiorespiratory fitness using heart rate and step count data
Features used | Train set | Test set |
|---|---|---|
None | − 0.137 ± 6.661 | 0.032 ± 6.760 |
\(x_{ant}\) | 0.084 ± 4.880 | 0.424 ± 5.392 |
\(x_{ant}, x_{chr}\) | 0.158 ± 3.878 | 0.261 ± 4.487 |
\(x_{ant}, x_{chr}, x_{resp}\) | 0.145 ± 3.324 | 0.083 ± 4.143 |
\(x_{ant}, x_{chr}, x_{resp}, x_{met}\) | − 0.082 ± 3.052 | 0.013 ± 3.946 |
