condition mean min max ZT0-3 10.943987499999999 10.177824999999999 11.710149999999999 ZT4-7 9.39054 9.39054 9.39054 ZT8-11 8.592984999999999 8.592984999999999 8.592984999999999 ZT12-15 0 0 0 ZT16-19 11.013200000000001 11.013200000000001 11.013200000000001 ZT20-23 12.43385 12.43385 12.43385