condition mean min max ZT0-3 158.022832 158.022832 158.022832 ZT4-7 150.9859435 150.9859435 150.9859435 ZT8-11 145.537221 145.537221 145.537221 ZT12-15 160.67330900000002 160.67330900000002 160.67330900000002 ZT16-19 177.36492550000003 177.36492550000003 177.36492550000003 ZT20-23 197.7324845 197.7324845 197.7324845