condition mean min max ZT0-3 125.675338 125.675338 125.675338 ZT4-7 137.0867965 137.0867965 137.0867965 ZT8-11 134.429383 134.429383 134.429383 ZT12-15 128.07309600000002 128.07309600000002 128.07309600000002 ZT16-19 158.9039675 158.9039675 158.9039675 ZT20-23 131.71248350000002 131.71248350000002 131.71248350000002