condition mean min max ZT0-3 300.77411555000003 263.6744068 337.8738243 ZT4-7 355.03214075 273.04814425 437.01613725 ZT8-11 308.97810107500004 259.08835095 358.8678512 ZT12-15 77.4121616175 56.380724044999994 98.44359919 ZT16-19 184.6000737625 123.955503175 245.24464435 ZT20-23 419.62863245 372.07435435 467.18291055