Final answer:
The real lower limit for the interval 30-39 is 30, and the real upper limit is 39.
Step-by-step explanation:
The frequency distribution table represents intervals of data values and their corresponding frequencies. The real lower limit of an interval is the smallest value that can be included in that interval, while the real upper limit is the largest value that can be included in that interval.
For example, in the interval of 30-39, the real lower limit would be 30 and the real upper limit would be 39. This means that any data value between 30 and 39 (inclusive) belongs to this interval.