Free Printable WorksheetMathGrade 8Math Curriculum8.SP.A.1

8.177 Identifying Misleading Graphs and Data Claims Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Grade 8 Math worksheet provides structured practice on 8.177 Identifying Misleading Graphs and Data Claims. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

8.177 Identifying Misleading Graphs and Data Claims - Which choice correctly identifies why the graph or claim is misleading or unsupported? (CCSS 8.SP.A.1; CCSS 6.SP.B.4; CA 8.SP.A.1; MA 8.SP.A.1)

Whether you are an educator preparing classroom handouts, a tutor reinforcing weekly topics, or a parent supporting homeschool learning, this printable resource gives students the deliberate practice required to achieve subject fluency and master state standards.

Grade

Grade 8

Subject

Math

Domain

Math Curriculum

Formats

PDF & DOCX

Sample Practice Problems

Preview the types of problems and questions covered in this worksheet

Below are sample questions representative of the exercises included on this worksheet and related 8.177 Identifying Misleading Graphs and Data Claims skill assessments:

Problem 1Difficulty: Hard

Two pitchers each average 60% strikes. Pitcher A records 58%, 60%, 61%, 60%, and 61%. Pitcher B records 30%, 60%, 60%, 90%, and 60%. A coach says, "The pitchers are equally accurate because their averages match." Why should a careful reader question this graph or claim?

AThe coach is correct because a mean of 60% proves both pitchers perform the same way each game.

BStrike rates must be expressed only as fractions out of 10.

CA pitcher cannot have a strike rate below 50% in a valid data set.

DThe coach is misleading because Pitcher B is much less consistent, so equal averages do not mean equal accuracy from game to game.

Solution & Explanation:Pitcher A stays close to 60% in every game, but Pitcher B swings widely from 30% to 90%. Matching averages do not show matching consistency.

Problem 2Difficulty: Hard

Box plot summary for Class A: min 78, Q1 79, median 80, Q3 81, max 82. Box plot summary for Class B: min 50, Q1 65, median 80, Q3 95, max 100. A newsletter says, "The classes performed the same because both medians are 80." Which issue makes the graph or statement misleading?

ABox plots may not include minimum and maximum values.

BTwo classes can only be compared if they have identical quartiles.

CThe statement is misleading because the medians match, but Class B has a much wider spread and very different overall performance.

DThe statement is true because the median is the only statistic that matters.

Solution & Explanation:The center is the same, but the distributions are very different. Class A is tightly packed around 80, while Class B is spread from 50 to 100.

Problem 3Difficulty: Hard

Battery Test A lasts 7.8, 8.0, 8.1, 8.0, and 8.1 hours. Battery Test B lasts 4.0, 8.0, 8.0, 8.0, and 12.0 hours. A product ad says, "Both batteries perform the same because the average life is about 8 hours." What is the main problem with the graph or claim?

AProduct ads are always fair if they use exact numbers.

BThe ad is misleading because Battery B is far less consistent, so an average of 8 hours does not mean the experiences are the same.

CThe ad is correct because averages tell the full story of battery life.

DBattery life cannot be written with decimals.

Solution & Explanation:Both sets average about 8 hours, but Battery Test A is tightly clustered while Battery Test B ranges from 4 to 12 hours. A single average hides that difference.

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QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Grade 8 Math students. It aligns with educational standard 8.SP.A.1 (Primary standard selected for prompt fields: CCSS 8.SP.A.1. Skill statement: Which choice correctly identifies why the graph or claim is misleading or unsupported? Associated standards listed with this skill: CCSS 8.SP.A.1; CCSS 6.SP.B.4; CA 8.SP.A.1; MA 8.SP.A.1. Use this embedded wording as the best available supporting standard description for this workflow.).