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To determine whether noise affects the ability to solve math problems, a researcher has one group solve math problems in a quiet room and another group solve math problems in a noisy room. The group solving problems in the noisy room completes 15 problems in one hour and the group solving problems in the quiet room completes 22 problems in one hour. In this experiment, the independent variable is .... .... .... .... .... .... and the dependent variable is .... .... .... .... .... .... .. .
- AThe number of problems solves; the difficulty of the problems
- BThe number of problems solved; the noise level in the room
- CThe noise level in the room; the number of problems solved
- DThe noise level in the room; the difficulty of the problems
Answer not set