condition mean min max ZT0-3 13.929691 13.929691 13.929691 ZT4-7 17.624717 17.624717 17.624717 ZT8-11 14.3541045 14.3541045 14.3541045 ZT12-15 12.166847 12.166847 12.166847 ZT16-19 10.8580045 10.8580045 10.8580045 ZT20-23 11.272091 11.272091 11.272091