The scale of measurement used when a teacher measures the number of correct answers on a quiz for each student is:

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Multiple Choice

The scale of measurement used when a teacher measures the number of correct answers on a quiz for each student is:

Explanation:
Counting the number of correct answers uses a ratio scale. That’s because there is a true zero—getting zero correct means the complete absence of the attribute being measured—and the intervals between scores are equal, so differences and ratios are meaningful. With this scale you can say one student has twice as many correct answers as another, compute averages, and express proportions like a percentage. The other scales don’t fit as well. Nominal would only group students without any inherent order. Ordinal would show who did better but not how much better. Interval has equal distances between scores but lacks a true zero, which isn’t the case here since zero correct is meaningful.

Counting the number of correct answers uses a ratio scale. That’s because there is a true zero—getting zero correct means the complete absence of the attribute being measured—and the intervals between scores are equal, so differences and ratios are meaningful. With this scale you can say one student has twice as many correct answers as another, compute averages, and express proportions like a percentage.

The other scales don’t fit as well. Nominal would only group students without any inherent order. Ordinal would show who did better but not how much better. Interval has equal distances between scores but lacks a true zero, which isn’t the case here since zero correct is meaningful.

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