This is actually a physics experiment. I've collected a set of data
Distance and time it takes for a cart to move down an incline plane. From here, I've calculated the average time (AVERAGE(all t's for that D)
) and then velocity ($\frac{D}{t_{avg}}$).
I am then asked to find an "even closer approximate" to the instantaneous velocity of the cart as it passes the midpoint of the incline plane. Also providing the uncertainty (STDERR). How do I do that, isn't D/Average Time
the best I can do?