condition mean min max ZT0-3 59.915099999999995 59.915099999999995 59.915099999999995 ZT4-7 51.995850000000004 51.995850000000004 51.995850000000004 ZT8-11 46.33025 46.33025 46.33025 ZT12-15 38.33755 38.33755 38.33755 ZT16-19 53.007549999999995 53.007549999999995 53.007549999999995 ZT20-23 60.88905 60.88905 60.88905