## Info

Note: Bold numbers are used in the interpolations and extrapolations discussed in the text.

Note: Bold numbers are used in the interpolations and extrapolations discussed in the text.

1.7.5 Sustained Peak Flow Rate and Sustained Minimum Flow Rate

Before we proceed to discuss the method of obtaining these flow rates, let us define the word moving average. Table 1.19 illustrates the concept. As indicated in the table, a moving average is one in which a constant number of moving elements are averaged in succession such that each succession overlaps each other by one element as the averaging moves forward. The number of moving elements being averaged above is three; therefore, this type of moving average is called a three-element moving average. If the number of elements were five, then the moving average would be called a five-element moving average.

The number of successive averages in the above table is 6 minus 3 plus 1, where 6 is the total number of elements, 3 is the number of moving elements being averaged in each succession, and 1 is added to get the correct answer. If the total number of elements were 8 and the number of moving elements being averaged were 2, the

Element number 