Sample size
Sample size is the count of quotes or completed shipments behind a published price. If the page does not give that count, the date, the car, and the lane, the average is unlabeled. Do not treat it as what you will pay.
A sample size, written as n, is how many data points were used. A count of quotes on one lane is a different fact from a national model that used no accepted shipments at all. The count belongs next to the price. So do the car, the route, and the date. Without them, you cannot tell whether you are looking at a market or at a single phone call.
What a thin sample can still do
A small, fully described shop can show a method. It cannot show what your car will cost on a different route next month. A price with no n is weaker than that. Say the count is missing, and do not average it into a calculator.
What RideShipper's range is
RideShipper's calculator shows a price range for planning. That range is an estimate, not a count of quotes you can book, and it is not a single fare. The number you can accept or reject is the written quote from a company. If a published average does not show its count, do not treat it as what you will pay.