condition mean min max ZT0-3 13.815337 13.815337 13.815337 ZT4-7 14.3165135 14.3165135 14.3165135 ZT8-11 14.967644 14.967644 14.967644 ZT12-15 16.553192 16.553192 16.553192 ZT16-19 12.2256085 12.2256085 12.2256085 ZT20-23 14.8233845 14.8233845 14.8233845