Gas Pump Wear

The wear pattern in this image shows a frequency distribution of customers’ finger placement as they take their receipt from a gasoline pump. They likely target their grab at the center of the receipt. As they remove the receipt, the paper and their fingers rub paint off the dispenser. The wear pattern seems to be symmetric about the center, that is, the right side of the wear pattern is a near mirror image of the left side. This shows that users favored neither left nor right more often in removing their receipts. The image of wear shows more wear near the center of the dispenser and less on the edges but it seems balanced at the central target point. The bell-shaped curve of appears to be a very good match for a normal curve.