Thumb Wars Lab Activity
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Next, we will look at three graphs formed by the data collected by our class. When you look at the graphs, pay special attention the the xaxes of the graphs and the yaxes of the graphs. You should notice that the independent variables are ALWAYS located on the xaxes and the dependent variable is ALWAYS located on the yaxes.

Look at the three graphs at the left formed from the class data table. Think about the following questions: What conclusions can we draw from the graphs? What could we have done to improve our results? Make sure you understand what the graphs mean because we will use the graphs to answer some questions in the lab quiz for this activity. Hint: My favorite thing to do when I analyze a graph is to imagine where I would place a best fit line among the data points on the graph. To find the best fit line for a graph, imagine a straight (not necessarily horizontal) line with as many data points above the line as below the line. This is the best fit line for the graph. Then, try to decide which sign of slope the best fit line has, positive (sloping upward from left to right), negative (sloping downward from left to right), or zero (horizontal). Finally, try to decide what the slopes of the best fit lines mean about the correlations between your thumb and wrist measurements and the likelihood of winning more thumb wars matches. 
Click the link below to open the lab quiz for this activity. The lab quiz is openbook and opennote, and you are allowed to work with your classmates. However, you have only ONE chance to complete the lab quiz. When you are finished with the lab quiz, you are finished with the "Thumb Wars Lab Activity."