X is a normally distributed random variable with a mean of 10.00. If the probability that X is less than 11.54 is 0.67 (as shown below), then what is the standard deviation of X? (Note: the diagram is not necessarily to scale.)
A) 1.75
B) 3.50
C) 4.20
D) 12.25

Question

X is a normally distributed random variable with a mean of 10.00. If the probability that X is less than 11.54 is 0.67 (as shown below), then what is the standard deviation of X? (Note: the diagram is not necessarily to scale.) 
A) 1.75 
B) 3.50 
C) 4.20 
D) 12.25

Quizplus · Accepted Answer

The Answer of X is a normally distributed random variable with a mean of 10.00. If the probability that X is less than 11.54 is 0.67 (as shown below), then what is the standard deviation of X? (Note: the diagram is not necessarily to scale.) 
A) 1.75 
B) 3.50 
C) 4.20 
D) 12.25

X Is a Normally Distributed Random Variable with a Mean