A quality control manager is inspecting four digital scales to see if they accurately reflect a weight of 0 ounces. The
table shows the weight displayed on four empty scales.
Empty Scale Weight Displays
-1 ounce
Scale 1
Scale 2
-2 ounces
Scale 3
0 ounces
Scale 4
-1 ounce
What is the average error in the scale displays?
O-4 ounces
O-1 ounces
00 ounces
01 ounce