Calculate the Sample Standard Deviation. 1  Calculate the mean or average of each data set. 2  To do this, add up all the numbers in a data set and divide by the total number of pieces of data. 3  For example, if you have found numbers in a data set, divide the sum by 4.
Over the average mileage of a commercial truck, usually around 130,000 miles, this equates to about $1.38 per mile, but the costs that make up this figure are varied. The most fundamental cost for any trucking company is the cost of the truck, trailer and the driver. Trucks arenât cheap.
Aided by a surging spot refrigerated freight market, national average spot truckload rates held firm for the week ended May 11. The national average reefer rate on the spot market increased to $2.15 per mile (all rates include fuel surcharge), up 3.3% week-over-week.