Miha

The presentation was very interesting and the background estimation techniques and unfolding methods that you presented are really impressive! However, many plots did not have axis titles which made it a bit hard to follow at times. Please also make sure that all plots have an ATLAS label (e.g. ATLAS Work in Progress if not published). See the TWiki page for the instructions: https://twiki.cern.ch/twiki/bin/view/AtlasProtected/NationalMeetingsPhysicsSchools.

Minor comments:

In general, try avoid using abbreviations. For example, you state what PCBT means, but the audience who is not familiar with ATLAS nomenclature will probably forget later on what it stands for.

Similar for the L, C, B labels. In many cases you have enough room to write out "light flavor".

p4: The Z->ee(mumu) + b(b) nomenclature is not fully clear because parentheses have different meaning in each case.

p7 - p8: You say that these are percentages, but it would be good to add an axis title as well

p12 - p13: It is not clear how the matrix is transformed. In once case the axis limits are [0, 1400] and in the other case they are [0, 10]. Label titles and units would be really useful here. I think you say it out loud, but if someone is just looking at the slides they will be confused.

p14: Without axis titles this is hard to follow.