Use the following information for questions:
Joan has noticed that the probability distribution for X = number of students in line to use the campus ATM machine when she shows up to use it is shown below.
-The variance of X, V(X) = 1.16. What is the standard deviation of X?
A) 1.08
B) 1.16
C) 1.35
D) 2.20

Question

Use the following information for questions:
 Joan has noticed that the probability distribution for X = number of students in line to use the campus ATM machine when she shows up to use it is shown below. 
-The variance of X, V(X) = 1.16. What is the standard deviation of X?
A) 1.08 
B) 1.16 
C) 1.35 
D) 2.20

Quizplus · Accepted Answer

The standard deviation is the square root of the variance. Therefore, the standard deviation of X is the square root of 1.16, which is approximately 1.08.

Use the Following Information for Questions