Anova1F

Declaration:

Anova1F (Data: TDoubleArray; TmLevel: TIntArray; var SSTm, SSErr, SSTotal: double; var DFTm, DFErr, DFTotal: integer; var FStat: double): double;

The function Anova1F performs a one-factorial ANOVA (analysis of variances). The data to be analysed must be stored in the array Data, the integer array TmLevel contains the corresponding group numbers (level of treatment). On return the function delivers the p-value of the ANOVA, or if the returned value is negative one of the following error codes: -1 ... no groups defined -2 ... too many groups defined -3 ... F value is undefined (MSbw and MSwi are both zero) -4 ... Data and TmLevel arrays have different lengths If the returned function value is positive or zero, the following variable parameters contain more details on the analysis of variances: SSTm sum of squares of treatments SSErr sum of squares of errors SSTotal total sum of squares DFTm degrees of freedom of treatments DFErr degrees of freedom of errors DFTotal total number of degrees of freedom FStat F value of the ANOVA