2. Researchers are interested in reducing a certain bacteria. A study is designed to measure the response of 30 subjects to treatment by one of three drugs. Below are the bacteria counts after treatment (LBS) with each drug. Is there a difference in the three drugs and, if so, where is the difference (i.e., multiple comparison tests)? Drug LBS Drug LBS Drug LBS a 11 d 6 placebo 16 a 8 d 6 placebo 13 a 5 d 7 placebo 11 a 14 d 8 placebo 9 a 19 18 placebo 21 6 8 placebo 16 a 10 d 19 placebo 12 a 6 d 8 placebo 12 11 d 5 placebo 7 a 3 d 15 placebo 12 SUMMARY Groups Count Sum Average Variance LBI--A 10 93 9.3 22.67777778 LBI--D 10 100 10 27.55555556 LBI--P 10 129 12.9 15.65555556 ANOVA Source of Variation SS MS F P-value F crit 72.8666 36.4333 0.20917 3.35413 Between Groups 2 1.658853288 5 21.9629 Within Groups 593 27 6 665.866 Total 29