Question

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.

what is the average error in the scale displays?

a) -4 ounces
b) -1 ounces
c) 0 ounces
d) 1 ounce

Answer 1

b) -1 ounces

Explanation:

To find the average, add the four values:

(-1)+(-2)+0+(-1)= -4

then divide the result by the number of scale displays (4):

Average= -4/4= -1

Answer 2

-1

Explanation:

-4+-1+0+1=-4

4 divided by -4 = -1