There are two groups of plants in an experiment, a group that receives fertilizer and another group that does not receive fertilizer. The height of the plants after two months is shown below: Fertilizer: 16.4, 15.7, 12.9, 14.5, 15.8, 14.3, 15.5, 15.9, 16.4, 13.8
No Fertilizer: 11.8, 12.4, 10.9, 11.3, 11.6, 11.8, 10.8, 10.2, 10.1, 10.9
What is the difference between the sample means for the treatment group and the control group?