condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0157096 0.0 0.0314192 ZT16-19 0.0320317 0.0320317 0.0320317 ZT20-23 0.0 0.0 0.0