I have a CV/resume question about presentations.

I am applying for my PhD, which requires that I submit a Curriculum Vitae. I have never written a CV before and am unclear about the appropriateness of including a presentation for which I was a contributor, but not the actual presenter.

I performed data collection, cleaning and analysis for two different work projects that were both submitted as abstracts (with my name as one of the authors) and were selected for presentation at the two conferences. Other members of the research teams attended the conferences and presented the research projects and findings.

Is this appropriate to include on my CV? How do I word it to not insinuate that I did the presentation myself?

TIA.