A system for scanning computer files for unwanted properties, such as containing computer viruses or being spam e-mail, allocates a priority to pending scan requests based upon the identity of a computer user associated with the scan request. A lifting base is movably attached to the support base. Thereafter, the base station requests a reduction of the bitrate associated with the air interface. Lower and upper quantile bounds for each of the plurality of data bins are determined based on the total number of data values that fall within each of the plurality of data bins.