condition mean min max ZT0-3 446.64111 446.64111 446.64111 ZT4-7 318.8435855 318.8435855 318.8435855 ZT8-11 303.8408155 303.8408155 303.8408155 ZT12-15 467.10605 467.10605 467.10605 ZT16-19 328.6301035 328.6301035 328.6301035 ZT20-23 442.09718 442.09718 442.09718