condition mean min max ZT0-3 0.39138927575 0.3564111975 0.426367354 ZT4-7 0.5174927257499999 0.3134153795 0.721570072 ZT8-11 4.280531049 1.6759964045000002 6.8850656935 ZT12-15 9.2734261225 8.4106696425 10.1361826025 ZT16-19 4.2506205285 3.481413596 5.019827461 ZT20-23 2.19188399725 2.0201353400000004 2.3636326545