condition mean min max ZT0-3 299.483015 299.483015 299.483015 ZT4-7 313.5848505 313.5848505 313.5848505 ZT8-11 313.8308055 313.8308055 313.8308055 ZT12-15 312.38358949999997 312.38358949999997 312.38358949999997 ZT16-19 349.5202275 349.5202275 349.5202275 ZT20-23 366.21373900000003 366.21373900000003 366.21373900000003