Summary Statistics for a Quantitative Variable

Summary Statistics for a Quantitative Variable is topic 1.7 of AP Statistics, inside Exploring One-Variable Data. This page works through three real practice questions on it, with the full reasoning behind each credited answer.

Practise this topic freeThe whole unit
105 questionsUsing Probability and Simulation100% with a figure
Worked examples

Three real summary statistics for a quantitative variable questions

From the practice pool, not the mock papers — each with the reasoning that produces the answer.

105 practice questions sit on this single topic — enough that it is worth working through by topic rather than meeting it scattered through a unit review.

100% of them come with a figure. Reading the graph or diagram correctly is most of the work here before any content knowledge applies.

84% test a single AP skill: Using Probability and Simulation. That makes this topic unusually predictable to prepare for.

Data Analysis · with figure

A graphical output is shown for survey indices. Which panel shows that Group X has the greater range?

  1. APanel A
  2. BPanel B
  3. CPanel C
  4. DPanel D
  5. EPanel Ecorrect
Why E is correct

Panel E shows that Group X has the greater range.

This is a strictblind AP Statistics figure item. The stem withholds the data needed to choose an answer, and the answer must be determined from the dotplot rendered from render_spec. The matching comparison must be identified from the displayed dotplot panel. The answer key is recomputed from the structured answer_rule.

Data Analysis · with figure

The school laptop program delta cycle has one extremely large charger return value. Which pair of summary statistics is generally more resistant to that outlier?

  1. AMedian and IQR.correct
  2. BUse the range.
  3. CMaximum and standard deviation.
  4. DMean and range.
  5. EMean and standard deviation.
Why A is correct

The median and IQR are more resistant to an extremely large value than the mean and standard deviation.

Resistant summaries for school laptop program delta cycle: the important cue is the school laptop program delta cycle setting. Match the method to the way the data are collected or the statistic is computed, then state the conclusion in the language of the stem.

Data Analysis · with figure

The park restoration crew delta cycle has one extremely large native seed germination value. Which pair of summary statistics is generally more resistant to that outlier?

  1. AMaximum and standard deviation.
  2. BMean and range.
  3. CUse the range.
  4. DMean and standard deviation.
  5. EMedian and IQR.correct
Why E is correct

The median and IQR are more resistant to an extremely large value than the mean and standard deviation.

Resistant summaries for park restoration crew delta cycle: the important cue is the park restoration crew delta cycle setting. Match the method to the way the data are collected or the statistic is computed, then state the conclusion in the language of the stem.

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Last reviewed 2026-08-28. Topic and unit names follow the College Board course framework. Question counts describe the PrepScore practice bank, not the exam.
Same unit
Comparing Distributions160 questionsDescribing the Distribution of a Quantitative Variable92 questionsNormal Distributions92 questions

Work summary statistics for a quantitative variable until the reasoning is automatic.

Real AP questions with a full explanation on every answer, and a mistake bank that only clears when you get it right.

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