condition mean min max ZT0-3 675.847589 675.847589 675.847589 ZT4-7 660.0136245 660.0136245 660.0136245 ZT8-11 655.0887970000001 655.0887970000001 655.0887970000001 ZT12-15 661.8954905 661.8954905 661.8954905 ZT16-19 794.122384 794.122384 794.122384 ZT20-23 881.3003120000001 881.3003120000001 881.3003120000001