condition mean min max ZT0-3 76.343543 76.343543 76.343543 ZT4-7 54.776914500000004 54.776914500000004 54.776914500000004 ZT8-11 60.177915 60.177915 60.177915 ZT12-15 69.703939 69.703939 69.703939 ZT16-19 105.8264245 105.8264245 105.8264245 ZT20-23 97.3821265 97.3821265 97.3821265