CompTIA Data+ (DA0-001) — Question 338

An analyst is conducting a survey to measure height. Which of the following is the most likely to decrease as the analyst collects more survey responses?

Answer options

• A. The mean
• B. The sample size
• C. The population
• D. The confidence interval

Correct answer: D

Explanation

The confidence interval is expected to decrease as more data is collected because it becomes narrower, reflecting increased precision in estimating the population parameter. The mean, sample size, and population do not inherently decrease with more responses; in fact, the sample size increases as more responses are collected.