condition mean min max ZT0-3 194.900549 194.900549 194.900549 ZT4-7 206.310402 206.310402 206.310402 ZT8-11 232.33319849999998 232.33319849999998 232.33319849999998 ZT12-15 173.94077349999998 173.94077349999998 173.94077349999998 ZT16-19 192.6851725 192.6851725 192.6851725 ZT20-23 205.0782105 205.0782105 205.0782105