condition mean min max ZT0-3 128.055483 128.055483 128.055483 ZT4-7 98.829666 98.829666 98.829666 ZT8-11 94.792202 94.792202 94.792202 ZT12-15 90.19917749999999 90.19917749999999 90.19917749999999 ZT16-19 86.77859000000001 86.77859000000001 86.77859000000001 ZT20-23 53.703064499999996 53.703064499999996 53.703064499999996