I am doing science lab about significant figure and I got following result

Experiment I: Significant Figures Goal: determine the number of significant figures in a measurement of the average speed of a rolling ball or cart. Average speed is defined this way: average speed = = distance elapsed time Equipment ball bearing or dynamics cart and track stopwatches meter stick Procedure Choose one student to release the ball or cart, and one student to catch it Give stopwatches to all other students Prop up one end of the track with a few blocks Choose positions to release and catch the ball or cart O choose positions more than 1 meter apart Measure and record the distance the ball or cart will roll Start timing when the ball or cart is released Stop timing when the ball or cart reaches the stopping point Analysis Enter all the time measurements in the table on the data sheet Identify the outliers in the table and list them below it "outliers" are unacceptably inaccurate measurements Determine the number of SF's for the time measurements ignoring outliers, find the number of digits in which all measurements agree add 1 to this number Calculate the average elapsed time to the correct number of SF's don't use the outliers Calculate the average speed to the correct number of SF's ON E 8