I have a master data sheet linked to several reports. I would like to share a workspace containing just the reports, and make the 'master data sheet' not visible to the collaborators. How can I do this?
In order to see data in a report, you have to be shared to the sheets the report is pulled from. If you share only the report and the not the sheets, the user will see a blank report. You can publish a read only version of the report. Anyone with the report URL can view it without being share to the report or sheets (they just cannot edit it).
Information on reports
Publishing reports