condition mean min max ZT0-3 48.9137 37.24209999999999 65.852 ZT4-7 34.9096 34.9096 34.9096 ZT8-11 54.2538 54.2538 54.2538 ZT12-15 53.65405 47.82055 59.48755 ZT16-19 32.105 32.105 32.105 ZT20-23 47.90805 47.90805 47.90805