In the context of test scores, compare the centers of the \(\text{two}\) distributions: class A mean \(81~\text{points}\), class B mean \(84~\text{points}\).

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Class B had the higher average score by 165 points because you add the means, 81 and 84, to compare them.

Class A had the higher average score by 3 points because its mean is 81 points compared with 84 points for class B.

Class B had the higher average score by 3 points because its mean is 84 points compared with 81 points for class A.

The two classes had about the same average score because 81 points and 84 points are close together.

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Curriculum context

Course: Math I
Standard: S-ID.3
Category: Statistics and Probability
Domain: Interpreting Categorical and Quantitative Data
Objective: Interpret differences in shape, center, spread, and outliers in context.
Problem type: Compare centers of two distributions in context