condition mean min max ZT0-3 14.901421 14.901421 14.901421 ZT4-7 111.21248399999999 111.21248399999999 111.21248399999999 ZT8-11 195.695042 195.695042 195.695042 ZT12-15 39.6197335 39.6197335 39.6197335 ZT16-19 20.7122465 20.7122465 20.7122465 ZT20-23 18.615475 18.615475 18.615475