condition mean min max ZT0-3 234.64432 234.64432 234.64432 ZT4-7 285.659755 285.659755 285.659755 ZT8-11 288.169486 288.169486 288.169486 ZT12-15 332.2315235 332.2315235 332.2315235 ZT16-19 285.7206835 285.7206835 285.7206835 ZT20-23 294.462826 294.462826 294.462826