§ 81.05 – What is a sample ratio?

(a)    A sample ratio is the ratio between the sample total of one measure of service-consumed and the sample total of another measure of service-consumed.  This Sampling Manual uses two sample ratios:

(1)   The ratio of sample total PMT over sample total UPT gives the sample APTL.

(2)   The ratio of sample total PMT over sample total PPMT gives the sample PMT/PPMT ratio.

(b)   They may be calculated for the entire annual sample or by the type of service days.