In this exercise, you will use statistics to analyze a dataset from Lake Mendota in Madison Wisconsin that spans the last 160 years. Every year, since 1855, someone has recorded when the lake froze (ice on), and when the lake thawed (ice off). We are going to use these data to ask, 'Is ice off date on Lake Mendota earlier?' To answer this question and at the same time quantify the uncertainty around the answer, you will use one of the most basic statistical techniques - a t-test. The learning objectives for this activity are: Analyze a historical, climatic dataset qualitatively and then quantitatively