condition mean min max ZT0-3 65.23541666666667 47.94145 84.71809999999999 ZT4-7 53.64945 53.64945 53.64945 ZT8-11 69.36505 69.36505 69.36505 ZT12-15 99.98297500000001 96.5287 103.43725 ZT16-19 95.4042 95.4042 95.4042 ZT20-23 96.22370000000001 96.22370000000001 96.22370000000001