>unit1   unit2
>10      10
>3       2
>5       10
>10      9
>10      6
>0       0
>7       9
>10      10
>8       8
>0       5
>7       6
>2       6
>9       8
>7       10
>8       9
>10      10
>4       10
>0       1
>3       3

Oh yeah.  The original question.  Your description of actual test was
important.  I don't think you can just add up the total number of failures,
since it looks like the "improvements" in unit 2 were for particular cases
of barcode "legibility."  So I think you should look at the amount of
improvement or decline for each case...

It looks to me like there are 5 cases where unit 2 does significantly better
(more that 2 more recognitions) than unit number 1:

>5       10
>0       5
>2       6
>7       10
>4       10

There is only ONE case where unit 1 appears to do significantly better:
>10      6

There are a number of cases where one is slightly better than the other,
which I discarded as liable to go either way on re-testing.

BillW

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