School Improvement in Maryland
Sample Item Scoring Information Return

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)

Student Produced Response (SPR) Item

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

/toolkit/vsc/assessment_items/msa_math_8_028.xml