condition mean min max ZT0-3 0.15681835 0.104826 0.21456755 ZT4-7 0.24417299999999997 0.24417299999999997 0.24417299999999997 ZT8-11 1.063151 1.063151 1.063151 ZT12-15 0.65728175 0.633067 0.6814965 ZT16-19 0.52626 0.52626 0.52626 ZT20-23 0.3293975 0.3293975 0.3293975