condition mean min max ZT0-3 317.3515 317.3515 317.3515 ZT4-7 284.5365 284.5365 284.5365 ZT8-11 279.111 279.111 279.111 ZT12-15 227.2355 227.2355 227.2355 ZT16-19 362.745 362.745 362.745 ZT20-23 326.83500000000004 326.83500000000004 326.83500000000004