condition mean min max ZT0-3 71.774958 71.774958 71.774958 ZT4-7 27.2869435 27.2869435 27.2869435 ZT8-11 38.5189405 38.5189405 38.5189405 ZT12-15 47.417015 47.417015 47.417015 ZT16-19 83.542362 83.542362 83.542362 ZT20-23 73.551518 73.551518 73.551518