An object was weighed by 5 different students with the following results: student 1: 44mg student 2: 46mg student 3: 39mg student 4: 41mg student 5: 48mg Calculate: the average mass 43.6 mg standard deviation of that mass 4.0 mg confidence range for 95% confidence level [ Select ] percent error if the accepted value was 39 mg [ Select ] precision of the measurements (mean+/-confidence range)