We are finally ready to fit our data to determine the power and the gravitational field
Now, we have our data with the associated , and our with their associated . The next step is to fit these data with a line to determine and . As before, we will be neglecting the uncertainty in the horizontal variable (though it appears on our graph!). We do, however, want to include the uncertainty in our fit. We will, therefore, want to do a weighted ordinary least squares – the instructions for which were in a previous lab.