The reaction time in seconds to a stop light for 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 (mean = .709)

-What is the standard deviation?
A)0.026
B)0.052
C)0.580
D)0.1613
E)0.0007

Question

The reaction time in seconds to a stop light for 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 (mean = .709)

-What is the standard deviation?
A)0.026
B)0.052
C)0.580
D)0.1613
E)0.0007

Quizplus · Accepted Answer

The standard deviation is calculated as the square root of the variance, which is 0.026^2 = 0.000676. Thus, the standard deviation is sqrt(0.000676) = 0.026. None of the other answer choices match this calculation.

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