In a $\square$ distribution, the frequency of a class is replaced with a proportion or percent.

• A. relative frequency
• B. grouped frequency
• C. cumulative frequency
• D. bimodal

Answer: (A)

Verified step by step guidance

1. Understand the concept of frequency in a distribution: frequency refers to the number of times a particular value or class occurs in a data set.
2. Recognize that the problem asks for the type of distribution where frequencies are replaced by proportions or percentages, which means the data is expressed relative to the total number of observations.
3. Recall the definitions of the options: 'relative frequency' is the frequency divided by the total number of observations, giving a proportion or percentage; 'grouped frequency' refers to frequencies within grouped classes; 'cumulative frequency' is the running total of frequencies up to a certain class; 'bimodal' describes a distribution with two modes.
4. Identify that the distribution where frequencies are replaced by proportions or percentages is called a 'relative frequency' distribution.
5. Conclude that the correct term to fill in the blank is 'relative frequency' because it directly relates to expressing frequencies as proportions or percentages.