condition mean min max ZT0-3 43.202155 43.202155 43.202155 ZT4-7 31.384978 31.384978 31.384978 ZT8-11 29.413762 29.413762 29.413762 ZT12-15 36.868031 36.868031 36.868031 ZT16-19 44.7028205 44.7028205 44.7028205 ZT20-23 47.9584665 47.9584665 47.9584665