condition mean min max ZT0-3 481.727766 481.727766 481.727766 ZT4-7 685.817124 685.817124 685.817124 ZT8-11 779.6958875 779.6958875 779.6958875 ZT12-15 693.8266685 693.8266685 693.8266685 ZT16-19 540.9817895 540.9817895 540.9817895 ZT20-23 390.859576 390.859576 390.859576