Strategy: The Art and Science of the Test

The chart above shows that 70 percent of the orders (37 percent of the dollars) fall below the average order size. Therefore, if you’re offering free shipping on all orders more than $99, most orders fall considerably below this amount. It’s too much of a stretch for someone to reach the minimum, and it’s still a reach to set the minimum order at $70, slightly more than the average order size in our example.