Data Collectionmedium
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A teacher wants to test whether a new teaching method improves student math achievement. She has 72 students with baseline math abilities ranging from well below to well above grade level. She creates 12 blocks of 6 students by grouping students with similar baseline abilities, then randomly assigns 3 students to the new method and 3 to the standard method within each block. What is the primary advantage of this randomized block design?
A teacher wants to test whether a new teaching method improves student math achievement. She has 72 students with baseline math abilities ranging from well below to well above grade level. She creates 12 blocks of 6 students by grouping students with similar baseline abilities, then randomly assigns 3 students to the new method and 3 to the standard method within each block. What is the primary advantage of this randomized block design?