condition mean min max ZT0-3 46.97088 8.61999 95.84975 ZT4-7 21.60975 21.60975 21.60975 ZT8-11 75.2589 75.2589 75.2589 ZT12-15 64.65075 35.882850000000005 93.41865 ZT16-19 109.99799999999999 109.99799999999999 109.99799999999999 ZT20-23 58.85445 58.85445 58.85445