Final answer:
The smallest numbers that can belong to a class in a frequency distribution are the lower class limits.
Step-by-step explanation:
The smallest numbers that can belong to a class in a frequency distribution are the lower class limits. The lower class limit is the smallest value that can be included in a specific class interval. For example, if a frequency distribution has class intervals of 0-10, 10-20, 20-30, the lower class limits would be 0, 10, and 20.
Lower class limits help define the range of values included in each class interval and are used to organize data in a frequency distribution. They are important for calculating frequencies and conducting statistical analyses.