AIR MATH

Math Question

A teacher wants to test the effectiveness of two different math textbooks. She divides her class into two groups. One group studies out of textbook \( A \) and the other out of textbook \( B \). \( A t \) the end of the year she tests both groups to see which one scores higher. This is an example of: A. An observational study B. An experiment C. Asurvey

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