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Table 4 Initial variability values for the amplification factors in the normalized frequency domain for the RP, NP, and TP profile sets

From: Deriving amplification factors from simple site parameters using generalized regression neural networks: implications for relevant site proxies

Data set RP–NF NP–NF TP–NF
Total initial variability \(\sigma_{\text{m}}\) 0.1060 0.0724 0.0714
Maximum initial variability \(\sigma_{ \hbox{max} }\) 0.1736 0.1187 0.1268
σ (f/f 0 = 0.05) 0.0261 0.0183 0.018
σ (f/f 0 = 0.1) 0.0301 0.0215 0.024
σ (f/f 0 = 0.2) 0.0373 0.0269 0.029
σ (f/f 0 = 0.4) 0.0600 0.0378 0.0418
σ (f/f 0 = 0.7) 0.1305 0.0904 0.1020
σ (f/f 0 = 1.0) 0.1673 0.1149 0.1228
σ (f/f 0 = 2.0) 0.1473 0.1101 0.1074
σ (f/f 0 = 4.0) 0.1281 0.0912 0.0908
σ (f/f 0 = 7.0) 0.1248 0.0829 0.0741
σ (f/f 0 = 10.0) 0.1239 0.0794 0.0682
σ (f/f 0 = 20.0) 0.1312 0.0833 0.0712