The reaction time in seconds to a stop light of a group of adult men were found to be
0.74, 0.71, 0.41, 0.82, 0.74, 0.85, 0.99, 0.71, 0.57, 0.85, 0.57, 0.55

-What is the mean?
A)0.709
B)0.710
C)0.920
D)0.725
E)0.550

Question

The reaction time in seconds to a stop light of a group of adult men were found to be
0.74, 0.71, 0.41, 0.82, 0.74, 0.85, 0.99, 0.71, 0.57, 0.85, 0.57, 0.55

-What is the mean?
A)0.709
B)0.710
C)0.920
D)0.725
E)0.550

Quizplus · Accepted Answer

The mean is calculated by summing all the reaction times and dividing by the number of observations: (0.74 + 0.71 + 0.41 + 0.82 + 0.74 + 0.85 + 0.99 + 0.71 + 0.57 + 0.85 + 0.57 + 0.55) / 12 = 0.709.

The Reaction Time in Seconds to a Stop Light of a Group