CERTIFIED-DATA-ANALYST-ASSOCIATE · Question #22
CERTIFIED-DATA-ANALYST-ASSOCIATE Question #22: Real Exam Question with Answer & Explanation
The correct answer is A: A branch of statistics that uses summary statistics to quantitatively describe and summarize data.. Option A is correct because descriptive statistics is precisely defined as using summary statistics (mean, median, mode, standard deviation, etc.) to quantitatively describe and summarize a dataset - no inference or prediction involved. Why the distractors fail: B describes infer
Question
Which of the following statements describes descriptive statistics?
Options
- AA branch of statistics that uses summary statistics to quantitatively describe and summarize data.
- BA branch of statistics that uses a variety of data analysis techniques to infer properties of an
- CA branch of statistics that uses quantitative variables that must take on a finite or countably
- DA branch of statistics that uses summary statistics to categorically describe and summarize data.
- EA branch of statistics that uses quantitative variables that must take on an uncountable set of
Explanation
Option A is correct because descriptive statistics is precisely defined as using summary statistics (mean, median, mode, standard deviation, etc.) to quantitatively describe and summarize a dataset - no inference or prediction involved.
Why the distractors fail:
- B describes inferential statistics, which draws conclusions about a population from a sample.
- C and E describe properties of variable types (discrete vs. continuous), not a branch of statistics at all.
- D is a near-miss - the word "categorically" makes it wrong. Descriptive statistics uses quantitative summaries, not categorical ones.
Memory tip: Think "descriptive = describe what's already there." You're summarizing the data in front of you with numbers (quantitatively), not making guesses about anything beyond it.
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