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
Scale 1
-1 ounce
Scale 2
-2 ounces
Scale 3
0 ounces
Scale 4
-1 ounce
What is the average error in the scale displays?
-4 ounces
-1 ounces
O0 ounces
O 1 ounce