condition mean min max ZT0-3 0.3160975 0.2118495 0.459538 ZT4-7 0.0857175 0.0857175 0.0857175 ZT8-11 0.300458 0.300458 0.300458 ZT12-15 0.6483055 0.5802215 0.7163895 ZT16-19 0.5159395 0.5159395 0.5159395 ZT20-23 0.6440275 0.6440275 0.6440275