condition mean min max ZT0-3 31.273049999999998 28.99755 33.54855 ZT4-7 29.607999999999997 29.607999999999997 29.607999999999997 ZT8-11 34.98350000000001 34.98350000000001 34.98350000000001 ZT12-15 0 0 0 ZT16-19 51.61215 51.61215 51.61215 ZT20-23 42.676050000000004 42.676050000000004 42.676050000000004