condition mean min max ZT0-3 205.048031 205.048031 205.048031 ZT4-7 245.64640400000002 245.64640400000002 245.64640400000002 ZT8-11 258.696528 258.696528 258.696528 ZT12-15 251.462826 251.462826 251.462826 ZT16-19 217.21106650000002 217.21106650000002 217.21106650000002 ZT20-23 252.04042500000003 252.04042500000003 252.04042500000003