Can I enter data directly into jMetrik?

No. jMetrik only provides a view of the data. If you must enter data manually, use a program like OpenOffice Calc, (it’s a free download). Save the file as a CSV (comma delimited) file. Import the CSV file into jMetrik. The first row of data in the CSV file may contain variable names, but variable names are not required. You should have one row of data for each examinee and one column for each variable.