9. The following table shows the number of bacteria colonies present in each of several petri dishes, after E. Coli bacteria were added to the dishes and they were incubated for 24 hours. The "soap"...

Extracted text: 9. The following table shows the number of bacteria colonies present in each of several petri dishes, after E. Coli bacteria were added to the dishes and they were incubated for 24 hours. The "soap" dishes contained a solution prepared from ordinary soap; the "control" dishes contained a solution of sterile water. Control 8 41.8 Soap 7 32.4 15.6 22.8 a) Apply a test to the 10% level to investigate whether soap affects the number of bacteria colonies that form. b) Draw a conclusion for your test.