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A school principal wants to observe how classroom area has an effect on classroom learning.
A school principal wants to observe how classroom area has an effect on classroom learning. The principal randomly chooses a group of students of the same age and grade, and places them in a classroom with an area of 400 square feet. The test scores of the class are recorded and analyzed at the end of the semester.How could this observation be changed into a valid experiment of the effects of classroom area?A.by including an identical classroom with a smaller number of students B.by including an identical classroom with students in a different grade C.by including a classroom with movable walls D.by including a classroom of identical area but a different shape
