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Exercise
Testing the Reaction Time of a Person

The reaction time of a person is of much importance in many critical situations. It is also well-known that the reaction time is strongly influenced by the consumption of alcohol or by the degree of fatigue. In order to decide whether the reaction time of a person is above some predefined threshold, a one-sample t-test should be applied. In order find significant differences for different experimental set-ups, a two-sample t-test should be used.

9 persons have repeated a reaction test on two different occasions between 10 and 40 times. The first test run was performed in early afternoon at the beginning of a two-hour course in statistics (column denoted by "t-early"). The second series of tests were conducted after the two-hour course ("t-late"). Go to the   and try to answer the following questions:
 


Last Update: 2006-Jšn-18