Is there a difference in the amount of airborne bacteria between carpeted and uncarpeted rooms? in an experiment, seven rooms were carpeted and seven were left uncarpeted. The rooms are similar in size and function. After a suitable period, the concentration of bacteria in the air was measured (in units of bacteria per cubic foot) in all of these rooms. The p-value for this test is greater than 0. 25. Which of the following is a reasonable conclusion?.