condition mean min max ZT0-3 130.770518 130.770518 130.770518 ZT4-7 147.649295 147.649295 147.649295 ZT8-11 137.11133949999999 137.11133949999999 137.11133949999999 ZT12-15 181.49994800000002 181.49994800000002 181.49994800000002 ZT16-19 116.160784 116.160784 116.160784 ZT20-23 128.415354 128.415354 128.415354