condition mean min max ZT0-3 433.616672 433.616672 433.616672 ZT4-7 385.188678 385.188678 385.188678 ZT8-11 523.30553 523.30553 523.30553 ZT12-15 457.14149499999996 457.14149499999996 457.14149499999996 ZT16-19 346.13255000000004 346.13255000000004 346.13255000000004 ZT20-23 394.2161375 394.2161375 394.2161375