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Statistics and probability

Course: Statistics and probability > Unit 2

Lesson 1: Displaying quantitative data with graphs
Math
Statistics and probability
Displaying and comparing quantitative data
Displaying quantitative data with graphs
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Reading stem and leaf plots

AP.STATS: UNC‑1 (EU), UNC‑1.G (LO), UNC‑1.G.2 (EK)
Google Classroom

Problem

A statistician for a chain of department stores created the following stem-and-leaf plot showing the number of pairs of glasses at each of the stores:
∣0010203040∣90366801235690001233570 \left| \quad \begin{matrix} 0 \vphantom{\Large{0}} \\ 1 \vphantom{\Large{0}} \\ 2 \vphantom{\Large{0}} \\ 3 \vphantom{\Large{0}} \\ 4 \vphantom{\Large{0}} \\ \end{matrix} \quad \right| \quad \begin{matrix} 9& \vphantom{\Large{0}} \\ 3&6&6&8& \vphantom{\Large{0}} \\ 1&2&3&5&6&9& \vphantom{\Large{0}} \\ 0& \vphantom{\Large{0}} \\ 1&2&3&3&5&7& \vphantom{\Large{0}} \\ \end{matrix}
Key: 4, vertical bar, 1, equals, 41 pairs of glasses
How many department stores have fewer than 38 pairs of glasses?
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
department stores
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