condition mean min max ZT0-3 96.417935 96.417935 96.417935 ZT4-7 86.0231175 86.0231175 86.0231175 ZT8-11 88.056089 88.056089 88.056089 ZT12-15 100.150192 100.150192 100.150192 ZT16-19 130.2650845 130.2650845 130.2650845 ZT20-23 144.943455 144.943455 144.943455