I was away and missed the live stream. Upon returning last night I saw the pop-up notification which took me to a recording of the live stream. David2's "plot" was there, shortly before Dave has to leave he holds a tablet up to the camera. First was pass/fail data, then a bit later "raw" data. I think that there was some good explanation of why some data are bad. In the reproducible research world (if making a document), it is best to show two plots with one including the "bad" data and the explanation of why it is bad. You don't want the scale set so that "real" variation cannot be seen. Of course, I don't think that they are planning a document on the testing.