condition mean min max ZT0-3 4.0350975 3.50952 4.560675 ZT4-7 4.868195 4.868195 4.868195 ZT8-11 5.33512 5.33512 5.33512 ZT12-15 0 0 0 ZT16-19 7.1511 7.1511 7.1511 ZT20-23 6.000955 6.000955 6.000955