condition mean min max ZT0-3 53.202653 53.202653 53.202653 ZT4-7 97.2515285 97.2515285 97.2515285 ZT8-11 104.50164950000001 104.50164950000001 104.50164950000001 ZT12-15 96.7205295 96.7205295 96.7205295 ZT16-19 178.0782935 178.0782935 178.0782935 ZT20-23 156.80505399999998 156.80505399999998 156.80505399999998