condition mean min max ZT0-3 408.214 374.27099999999996 434.957 ZT4-7 382.9095 382.9095 382.9095 ZT8-11 324.0385 324.0385 324.0385 ZT12-15 319.79449999999997 301.827 337.762 ZT16-19 387.327 387.327 387.327 ZT20-23 363.7305 363.7305 363.7305