Tools | Performance | Assessment | System Utilities | Results
Select – Delete a Selection of Results
Browse to the Group required
Select ALL (or tick the students required)
Browse to the Aspects the results are associated with
Tick required aspects and Click Apply
Select either Result Set / or Results with no result set
Select date range From and To
Select Template associated with (if required)
Select OMR Sheets associated (if required)
Also, another way is to right click the cell and View/Edit the results History. This will then delete permanently.
If you delete from the front facing cell this will not delete the result.