AP Statistics · Topic 1.7

Summary Statistics for a Quantitative Variable Practice

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

Practice questions

47

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Sample questions

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Sample 1difficulty 1/5
$The notation x̄ refers to the$
- A
  $Population mean$
- B
  $Median$
- C
  $Sample mean$
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- D
  $Mode$
Why
$x̄ = sample mean; μ = population mean.$
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Sample 2difficulty 1/5
$The range of {5, 9, 12, 15, 22} is$
- A
  $5$
- B
  $22$
- C
  $12$
- D
  $17$
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Why
$Max - min = 22 - 5 = 17.$
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Sample 3difficulty 2/5
$The median of {3, 7, 8, 12, 15} is$
- A
  $9$
- B
  $7$
- C
  $3$
- D
  $8$
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Why
$Middle value of 5 sorted values is the 3rd: 8.$
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Sample 4difficulty 2/5
$Which is NOT a measure of spread?$
- A
  $SD$
- B
  $IQR$
- C
  $Median$
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- D
  $Range$
Why
$Median is a measure of center, not spread.$
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Sample 5difficulty 2/5
$A botanist measured the heights of 12 sunflower plants. The minimum height was 142 cm and the maximum was 218 cm.$
$What is the range of the plant heights?$
- A
  $142 cm$
- B
  $218 cm$
- C
  $180 cm$
- D
  $76 cm$
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Why
$Range = maximum - minimum = 218 - 142 = 76 cm.$
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