Frequency distribution

The irder array below resulted from taking a sample of 25 batches of 500 computer chips and determining how many in each batch were defective.

Defects:

1 2 4 4 5 5 6 7 9 10 12 12 14
17 20 21 23 23 24 26 27 27 28 29 29

If a frequency distribution for the defects data is constructed, using ' 0 but less than 5' as the first class, what would be the cumulative relative frequency of the '15 but less than 20' class is ??? %

更新1:

The second word is "ordered" instead of "irder"

更新2:

disregard all the sign of &#039 in second paragraph, it is an open and close quotation mark

更新3:

1, 2, 4, 4, 5, 5, 6, 7, 9, 10, 12, 12, 14 17, 20, 21, 23, 23, 24, 26, 27, 27, 28, 29, 29

回答 (1)