Question

The standard diameter of a golf ball is 42.67 mm. A golf ball factory does quality control on the balls it manufactures. Golf balls are randomly measured to ensure the correct size. One day, an inspector decides to stop production if the discrepancy in diameter is more than 0.002 mm. What is the range of acceptable values?
42.668 mm to 42.670 mm
42.668 mm to 42.672 mm
42.670 mm to 42.672 mm
42.670 mm to 42.674 mm

Answer 1

Standard ± 0.002 mm gives 42.67 − 0.002 = 42.668 mm to 42.67 + 0.002 = 42.672 mm. So: 42.668 mm to 42.672 mm.