TABLE 2-12 the Ordered Array Below Resulted from Taking a Sample of Sample

Short Answer

TABLE 2-12
The ordered array below resulted from taking a sample of 25 batches of 500 computer chips and determining how many in each batch were defective.
Defects

-Referring to Table 2-12, if a frequency distribution for the defects data is constructed, using "0 but less than 5" as the first class, the relative frequency of the "15 but less than 20" class would be ________.