Open-ended intervals are sometimes used in frequency distributions to permit including extreme values and placing missing data in end categories. They allow retaining individual numerical values within each interval rather than averaging them, simplifying calculations and yielding a better histogram.

1. Open-ended intervals are sometimes used in a frequency distribution because
Answer
they permit the inclusion of extreme values in the table.
the individual numerical values are retained within each interval.
they simplify calculations and yield a better histogram.
some missing data values can be placed in the end categories.
Solution
the individual numerical values are retained within each interval.