Which of the following is an example of qualitative data?

Qualitative data refers to non-numeric information that describes qualities or characteristics. Customer feedback is a prime example of qualitative data because it often consists of subjective insights, opinions, and descriptions that cannot be quantified numerically. This type of data is often used to understand customer experiences, preferences, and perceptions, providing rich context that numerical data alone cannot offer.

In contrast, the other options represent quantitative data, which can be measured and expressed numerically. Sales revenue, employee turnover rates, and annual profit margins all involve specific numerical values that can be calculated and analyzed statistically. These figures provide hard data that can be used for analysis, forecasting, and decision-making, but they do not capture the descriptive insights that qualitative data offers.