Estimating, Error Rates & Plotting
Take your class outside and designate a single starting
point. From that point throw 5 or 6 objects at various distances. Next, ask
your students to estimate how many feet each object is from the starting point.
After they have estimated each object have them measure the length to the
nearest foot and record their data in a table such as that below.
Next, have each student calculate their error rate using the
formula (actual) – (estimate) / (actual) and change their decimal to a percent.
Finally, have the students plot the points on a coordinate
(x,y) plane and form a scatter plot. It’s best to have them graph the equation
y = x so that they can see their error rates.
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