컴퓨터는 67 cm에 위치시키고 원의 가장자리를 5군데 클릭하도록 하고, 이를 3회 반복 측정하여 평균값을 mm 단위로 기록하였다.
The computer was placed at 67 cm, and the advantage for the group had been clicked at 5 places, and this was measured three times additionally the average value was recorded in mm.