condition mean min max ZT0-3 273.12725 261.829 284.4255 ZT4-7 71.63550000000001 71.63550000000001 71.63550000000001 ZT8-11 8.52955 8.52955 8.52955 ZT12-15 0 0 0 ZT16-19 13.58805 13.58805 13.58805 ZT20-23 69.11019999999999 69.11019999999999 69.11019999999999