condition mean min max ZT0-3 4849.486242 4849.486242 4849.486242 ZT4-7 3130.884336 3130.884336 3130.884336 ZT8-11 3200.825978 3200.825978 3200.825978 ZT12-15 4121.1711095 4121.1711095 4121.1711095 ZT16-19 5950.439143 5950.439143 5950.439143 ZT20-23 7185.3041385 7185.3041385 7185.3041385