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Communicating conclusions with evidence
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Grade Level
Grade 7
7.147 Communicating conclusions with evidence
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Two quizzes had these score sets. Quiz 1: 70, 72, 74, 76, 78. Quiz 2: 50, 72, 74, 76, 78. A student says Quiz 2 was much harder because its mean is lower. Which response is best supported?
A
The student is correct because every score on Quiz 2 is lower than every score on Quiz 1.
B
The student is partly using evidence, but the medians are the same at 74; Quiz 2 has one low outlier that lowers its mean and increases its spread.
C
Quiz 1 was harder because it has the smaller range.
D
The quizzes cannot be compared because each has five scores.
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