condition mean min max ZT0-3 31.6316 27.218 36.0452 ZT4-7 26.11065 26.11065 26.11065 ZT8-11 73.09785 73.09785 73.09785 ZT12-15 0 0 0 ZT16-19 88.98355000000001 88.98355000000001 88.98355000000001 ZT20-23 56.21575 56.21575 56.21575