Results The variable is a dependent variable, and the influencing factors are factors, such as whether there is statistical difference in altitude between different gender samples, sex selection as a factor and altitude as a dependent variable. Single factor experimental design is also called completely random experimental design. Experimental design requires a high degree of uniformity of experimental conditions or experimental environment. For example, comparing the yield of a crop variety, each variety has n replicates, and all experiments have one time.

SAS system

It mainly completes four data-centric tasks: data access; Data management (sas's data management function is not very good, but its data analysis ability is strong, so Microsoft products are often used to manage data and then converted into sas data format. Pay attention to the matching use with other software); Data presentation; Data analysis. At present, the highest version of (20 16) software is SAS9.4. Base SAS module is the core of SAS system.