The following script sets up CSV data connect in new book with sample CSV data and run script to add mean label row to show mean values of each column of imported data.

newbook;
wbook.dc.add("CSV");
wks.dc.source$=System.path.program$+"Samples\Batch Processing\T275K.csv";
wks.dc.script$="wks.userparam(++Mean);
loop(i,1,wks.dc.c2) { wcol(i)[Mean]$="=Mean(this)";}";
wks.dc.import();