condition mean min max ZT0-3 176.727334 176.727334 176.727334 ZT4-7 155.6057625 155.6057625 155.6057625 ZT8-11 103.8092635 103.8092635 103.8092635 ZT12-15 101.9570785 101.9570785 101.9570785 ZT16-19 163.532057 163.532057 163.532057 ZT20-23 184.11305199999998 184.11305199999998 184.11305199999998