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Chess Tournament: A Rating Spread Audit

Analyze chess tournament ratings using mean, median, IQR, and MAD, then investigate how a late entry changes the distribution.

Grade 6MathInteractive · Printable

Aligned to6.SP.B.5.c

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What’s included

Single worksheet
Auto-graded online
1 Common Core standard
Printable answer key
14 questions
Classroom-ready

Details

Format: Interactive · Printable
Grade: Grade 6
Subject: Math
Question types: Fill in the blank, Multiple choice, Circle the answer, Short answer

About this worksheet

What students practice

Students calculate mean, median, interquartile range, and mean absolute deviation from rating data.
Students compare rating distributions using measures of center and variability.
Students explain how an extreme rating affects summary statistics and the distribution's pattern.

How to use

Have students show calculations on separate paper. Discuss why two groups can have the same IQR but different MADs before students analyze the late entry.

Curriculum

Common Core standard covered

6.SP.B.5.c

Find the median, mean, interquartile range, and mean absolute deviation, and describe the pattern and any striking outliers.

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Name Date

Chess Tournament: A Rating Spread Audit

Use center and variability to evaluate tournament rating groups.

Audit the Opening Group

Ratings describe players' estimated playing strength, not points earned in a game. Use the opening group for Questions 1–5. For quartiles, find the median of each half; exclude the overall median when there is an odd number of values.