School Improvement in Maryland

Using the State Curriculum: Mathematics, Grade 7

Algebra | Geometry | Measurement | Statistics | Probability | Number | Processes

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Standard 4.0 Knowledge of Statistics

Topic B. Data Analysis

Indicator 2. Describe a set of data

Objective a. Analyze measures of central tendency to determine or apply mean, median, mode

Assessment limit: Use no more than 15 pieces of data for the mean or median; or 15 to 30 pieces of data for the mode, using whole numbers or decimals with no more than 2 decimal places (0 – 100)

Brief Constructed Response (BCR) Item

Students in a marching band collected money for new uniforms. This table shows the amount of money they collected last week.

COLLECTIONS

Day Amount
Monday $25.34
Tuesday $10.45
Wednesday $39.77
Thursday $78.35
Friday $63.29
Saturday $44.26
Sunday $57.18

Step A
What is the mean amount of money the students collected?

$___________

Step B

The amounts for Saturday and Sunday were recorded incorrectly. Saturday should have been $34.24, and Sunday should have been $75.18. Use what you know about determining the mean to explain how these changes will affect your answer in Step A. Use words, data, and/or symbols in your explanation.

/toolkit/vsc/assessment_items/msa_math_7_036.xml

Assessment limit:
Use no more than 15 pieces of data for the mean or median; or 15 to 30 pieces of data for the mode, using whole numbers or decimals with no more than 2 decimal places (0 – 100)

View Scoring Information
Resources for Objective 4.B.2.a:
Sample Assessments | PUBLIC RELEASE ITEMS |