A group of students practice walking at a constant speed until they feel that they are able to reproduce that particular speed at will. To test this, they make ten trials where they use a motion detector to measure the distance that they walk in 3.83 seconds. They measure the following distances: 1.88, 1.93, 1.92, 1.85, 2.02, 1.96, 2.08, 1.88, 1.79, 2.04 m.
What is the best estimate of the uncertainty in any single one of the distance measurements?