condition mean min max ZT0-3 3.0876 3.076195 3.099005 ZT4-7 3.792385 3.792385 3.792385 ZT8-11 12.7568 12.7568 12.7568 ZT12-15 0 0 0 ZT16-19 7.277565 7.277565 7.277565 ZT20-23 4.763525 4.763525 4.763525