Question

Statistics/Algebra 2

Answer 1

A school principal wants to observe how the natural circulation of air 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 room with open windows. 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 air circulation?

A. by adding an identical classroom and opening the doors of both classrooms
B. by adding an identical classroom and closing the windows of both classrooms
C. by adding an identical classroom and allowing students to use electric fans in it
D. by adding an identical classroom that has adjustable windows

Answer 2

i think c would be the right choice because the fans would change the air flow

Answer 3

it was D

Answer 4

lol but thanks

Answer 5

oh that doesn't even make any sense to me at all lol

Answer 6

sorry i gave you the wrong answer

Answer 7

its fine ;)