It's interesting too because the price with the tip included is 40% higher for coffee and 22% higher for the eggs. I wonder if 22-40% is the normal tipping rang

It's interesting too because the price with the tip included is 40% higher for coffee and 22% higher for the eggs. I wonder if 22-40% is the normal tipping range for the area. Would the experiment have turned out differently if for example they raised the prices by 15-20% across the board rather than 22-40%?