Final answer:
A dot plot is the most effective chart for displaying qualitative data.
Step-by-step explanation:
The most effective chart for displaying qualitative data is the dot plot.
A dot plot is a simple graph that uses dots to represent the frequency or values of subcategories in a dataset. Each dot represents a single data point, and the dots are placed along a number line according to their value. The dot plot allows easy comparison and identification of patterns or trends in qualitative data.