condition mean min max ZT0-3 13.993749999999999 13.993749999999999 13.993749999999999 ZT4-7 14.13565 14.13565 14.13565 ZT8-11 8.558689999999999 8.558689999999999 8.558689999999999 ZT12-15 6.134615 6.134615 6.134615 ZT16-19 10.51732 10.51732 10.51732 ZT20-23 10.562345 10.562345 10.562345