What makes a measurement more precise than another?

1) Use of instruments with smallest precision

E. g Micrometer (0.01mm) is more accurate than Vernier

Caliper (0.01cm)

2) Correct eye position

To eliminate parallax error

3) Reduce human error by dividing the time taken by the

number of oscillations.

E. g 20 oscillations timing is 18 seconds. Human reaction

error is about 0.03 seconds. Dividing 18 seconds by 20

oscillations to get the time taken for 1 oscillations will

reduce human reaction time by 20 times. I think this is

called percentage error. Same thing goes for the

measurement for the diameter of wire by winding it

around a core 20 times and measure.

4) Take average measurements to increase accuracy.

Etc ... If u need more, u can comment.