A researcher records the time in seconds it takes a sample of participants to walk alone through a dark portion of campus.The researcher computes SS = 1,200.Assuming that a sample of 25 participants was observed in this study,what is the standard deviation for these data?
A)48 seconds
B)50 seconds
C)6.9 seconds
D)7.1 seconds

Question

Quizplus · Accepted Answer

The standard deviation is calculated by taking the square root of the variance. The variance is SS divided by the number of participants minus 1 (n-1). So, variance = 1200 / (25-1) = 50. The standard deviation is the square root of 50, which is approximately 7.1 seconds.

A Researcher Records the Time in Seconds It Takes a Sample