condition mean min max ZT0-3 95.546772 95.546772 95.546772 ZT4-7 157.4574245 157.4574245 157.4574245 ZT8-11 198.39512 198.39512 198.39512 ZT12-15 150.336613 150.336613 150.336613 ZT16-19 147.6467365 147.6467365 147.6467365 ZT20-23 147.9559715 147.9559715 147.9559715