But now suppose we mix in with the No.

10 some No.

6 and some No.

14, and then take the average size; we may now get just the same average, and we can tell that this pile is different from the other only by observing the individual measurements of the single shot and setting down the relative frequency of each particular size.

Or, again, we may get a different average size in one of two ways: either by taking another lot of uniform No.