A researcher wanted to determine if carpeted or uncarpeted rooms contain more bacteria. The table shows the results for Full data set D the number of bacteria per cubic foot for both types of rooms. A normal probability plot and boxplot indicate that the data Carpeted Uncarpeted are approximately normally distributed with no outliers. Do carpeted rooms have more bacteria than uncarpeted rooms at 9.1 12 35 1o_9 11.5 5.5 the a = 0.05 level of signicance? 7.5 11.7 7_1 10 10.1 13.9 6.1 1 1 .9 8.9 13.3