Subject: What is the best way to perform a 'dumbed down' error analysis?

We are conducting an experiment in a high school Physics class. The students 
are repeating experiments with a cart rolling down an incline, finding the 
acceleration, then changing the angle of incline and finding how that affects 
the acceleration. We would like them to compare their experimental value to 
the theoretical and see if they are within the error. We would like to use 
more than the standard deviation, but not do a full blown error analysis. The 
uncertainties will be very small because the equipment is very precise 
(optical sensors). Thank you.

Re: What is the best way to perform a 'dumbed down' error analysis?