condition mean min max ZT0-3 1.8122699999999998 1.465225 2.159315 ZT4-7 1.84862 1.84862 1.84862 ZT8-11 1.4209749999999999 1.4209749999999999 1.4209749999999999 ZT12-15 0 0 0 ZT16-19 3.089245 3.089245 3.089245 ZT20-23 2.8308150000000003 2.8308150000000003 2.8308150000000003