condition mean min max ZT0-3 115.6755 115.6755 115.6755 ZT4-7 157.4395 157.4395 157.4395 ZT8-11 163.09199999999998 163.09199999999998 163.09199999999998 ZT12-15 145.24200000000002 145.24200000000002 145.24200000000002 ZT16-19 131.40800000000002 131.40800000000002 131.40800000000002 ZT20-23 116.314 116.314 116.314