condition mean min max ZT0-3 24.963675000000002 22.09335 27.834 ZT4-7 22.4111 22.4111 22.4111 ZT8-11 21.7056 21.7056 21.7056 ZT12-15 0 0 0 ZT16-19 22.809649999999998 22.809649999999998 22.809649999999998 ZT20-23 27.178800000000003 27.178800000000003 27.178800000000003