AP Statistics · Topic 1.5

Representing a Quantitative Variable with Graphs Practice

Part of Exploring One-Variable Data.(UNC-1.C)

Practice questions

4

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Sample questions

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Sample 1difficulty 2/5
$Compared with a histogram, a stemplot$
- A
  $Requires categorical data$
- B
  $Cannot show shape$
- C
  $Preserves individual data values$
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- D
  $Loses individual values$
Why
$Stemplots keep raw values; histograms display only counts per bin.$
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Sample 2difficulty 2/5
$Hours of sleep for 100 students were recorded and shown in the histogram.$
$Where is the mode (modal class)?$
- A
  $Around 7 hours$
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- B
  $Around 11 hours$
- C
  $Around 4 hours$
- D
  $Around 5 hours$
Why
$The tallest bar is centered near 7 hours, indicating the modal class.$
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Sample 3difficulty 2/5
$A dotplot is best for$
- A
  $Time series only$
- B
  $Two categorical variables$
- C
  $Small datasets where individual values are visible$
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- D
  $Large datasets (1000s)$
Why
$Dotplots work best with small to moderate n; each value gets its own dot.$
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Sample 4difficulty 3/5
$A teacher made the stemplot of scores from a 23-student class.$
$Which best describes the shape?$
- A
  $Roughly symmetric, unimodal$
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- B
  $Strongly skewed right$
- C
  $Uniform$
- D
  $Bimodal$
Why
$The leaf counts increase to a single peak in the 70s and decrease similarly on either side — roughly symmetric and unimodal.$
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