ttest for Independent
Samples  Alternative Arrangement of Data
Sometimes, the data are already arranged (e.g., as in a spreadsheet)
such that each column or variable in the file represents one group:

Male 
Female 
case 1 
111 
102 
case 2 
110 
104 
case 3 
109 

Note that the Independent
ttest option of the Basic
Statistics and Tables module can also compute ttests
for data arranged in this manner. However, we should stress that this
arrangement is atypical and generally not recommended when creating large
data files. Practically all data analysis software, including STATISTICA,
usually assumes data to be arranged as shown in Arrangement
of data. The earlier arrangement allows us to identify each individual
respondent or subject in the data file; thus, when there are multiple
dependent variables of interest, various multivariate methods can be applied
which rely on the (withingroup) correlation matrices of variables.