condition mean min max ZT0-3 9.575998333333333 6.45018 12.0434 ZT4-7 4.476025 4.476025 4.476025 ZT8-11 2.560775 2.560775 2.560775 ZT12-15 11.69365 11.23735 12.14995 ZT16-19 11.52495 11.52495 11.52495 ZT20-23 14.25655 14.25655 14.25655