condition mean min max ZT0-3 43.07219 43.07219 43.07219 ZT4-7 15.1199565 15.1199565 15.1199565 ZT8-11 22.8404745 22.8404745 22.8404745 ZT12-15 30.512939 30.512939 30.512939 ZT16-19 27.337161000000002 27.337161000000002 27.337161000000002 ZT20-23 24.177850499999998 24.177850499999998 24.177850499999998