When there are only two quantities involved, the arithmetic mean is obtained simply by adding the quantities and dividing by 2. In these cases, the operation is sometimes symbolized by a double colon (::) between the two quantities to be averaged. For example:
Salary Data by Industry. As of May 2011, companies involved in computer systems design services paid the highest salaries to construction project managers at an average annual wage of $136,770. Construction managers engaged in building accommodations for travelers earned an average of $130,510 per year.
How much does a Project Engineering Manager make? The median annual Project Engineering Manager salary is $129,257, as of March 31, 2017, with a range usually between $112,510-$145,343, however this can vary widely depending on a variety of factors.