condition mean min max ZT0-3 75.78601666666667 41.683350000000004 99.744 ZT4-7 43.19995 43.19995 43.19995 ZT8-11 39.07355 39.07355 39.07355 ZT12-15 67.16675000000001 62.32315 72.01035 ZT16-19 92.43809999999999 92.43809999999999 92.43809999999999 ZT20-23 135.97250000000003 135.97250000000003 135.97250000000003