Which unit is better?

I have two units, one is supposed to be "improved" over the other.  I ran
200 tests on each unit, and recorded the number of successful tests out of
each  group of ten tests.  I am trying to prove to myself whether one is
actually better than the other, or that the differences are insignifigant,
statistically.  Here is the raw data

Successful tests
out of ten tries

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

113     132 out of 200  total # tests
57%     66% success rate

Avg     5.947368421     6.947368421     Average
St. Dev 3.703957106     3.341218743     St Dev

Now on the surface Unit 2 looks slightly better than unit 1.  However, the
standard deviations are so large, maybe it is just a statistical fluke and
next time unit 1 will look better.  Any body got enough math whizzing
around their brain to tell?

P.S. THe manufacturer says the tests should be 95% successful.  Yeah
right.

--Lawrence the Skeptical


--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads