condition mean min max ZT0-3 744.30699 744.30699 744.30699 ZT4-7 516.091686 516.091686 516.091686 ZT8-11 307.6032295 307.6032295 307.6032295 ZT12-15 382.0721185 382.0721185 382.0721185 ZT16-19 649.781928 649.781928 649.781928 ZT20-23 1010.029136 1010.029136 1010.029136