An audiologist is conducting a study on noise and stress. Twelve subjects selected at random were given a stress test in a room that was quiet. Then the same subjects were given another stress test, this time in a room with high-pitched background noise. The results of the stress tests were scores 1 through 20, with 20 indicating the greatest stress. The results follow, where B represents the score of the test administered in the quiet room and A represents the scores of the test administered in the room with the high-pitched background noise.

Sub.123456789101112

B13121619713915176148

A18151418101211141781611

Test the hypothesis that the stress level was greater during exposure to noise. Look at

the p-value. Should you reject the null hypothesis at the 1% level of significance? At the

5% level?