School Improvement in Maryland

Sample Item
Student Produced Response Item for Grade 8

Standard 4.0 Knowledge of Statistics

Topic B. Data Analysis

Indicator 1. Analyze data

Objective b. Interpret box-and-whisker plots

Assessment limit: Use minimum, first (lower) quartile, median (middle quartile), third (upper) quartile, or maximum and whole numbers (0 – 100)

Look at the box-and-whisker plots below.

Populations of Countries in South America and Africa
(in millions of people)

plot comparing population of africa with that of south america

(source: www.aneki.com)

What is the difference in the medians of the two data sets? (Note: 19plus or minus2 should be acceptable.)

blank SPR form


Correct Answer
19
Answer Annotation

Answer:

SPR form with 19 at right

or

SPR form with 19 at left
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