The period of the vertical oscillations of a mass hanging from a spring is known to be constant. (a) a student times single oscillations with a stopwatch. in 10 separate measurements, the stopwatch readings were: 1.8s, 1.9s, 1.7s, 1.9s, 1.8s, 1.8s, 1.9s, 1.7s, 1.8s, 1.8s. what is the best value obtainable from these readings for the time of one oscillation? explain how you arrive at your answer