condition mean min max ZT0-3 9.859365 7.237830000000001 12.4809 ZT4-7 65.31095 65.31095 65.31095 ZT8-11 379.57050000000004 379.57050000000004 379.57050000000004 ZT12-15 0 0 0 ZT16-19 58.3425 58.3425 58.3425 ZT20-23 18.792 18.792 18.792