DA0-001 · Question #121
Which one of the following would not normally be considered a summary statistic?
The correct answer is A. z-score. A z-score is a standardized score for an individual data point, expressing how many standard deviations that point is from the mean. It is a transformation applied to individual values, not a statistic that summarizes an entire dataset. Mean, variance, and standard deviation…
Question
Which one of the following would not normally be considered a summary statistic?
Options
- Az-score.
- BMean.
- CVariance.
- DStandard deviation.
How the community answered
(47 responses)- A91% (43)
- B4% (2)
- C2% (1)
- D2% (1)
Explanation
A z-score is a standardized score for an individual data point, expressing how many standard deviations that point is from the mean. It is a transformation applied to individual values, not a statistic that summarizes an entire dataset. Mean, variance, and standard deviation are all classic summary (descriptive) statistics - they condense an entire distribution into a single representative value describing the dataset as a whole.
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