condition mean min max ZT0-3 155.887663 155.887663 155.887663 ZT4-7 145.2896745 145.2896745 145.2896745 ZT8-11 127.194509 127.194509 127.194509 ZT12-15 128.859689 128.859689 128.859689 ZT16-19 140.9957195 140.9957195 140.9957195 ZT20-23 152.546957 152.546957 152.546957