Suppose x is a normal random variable with mean ($\mu$)equal to 60 and standard deviation ($\sigma$)of 2.If the z score was calculated to be 3.4, what is the value of x?
A)63.4
B)56.6
C)68.6
D)53.2
E)66.8

Question

Quizplus · Accepted Answer

We can use the formula 
z = (x - μ) / σ 
to solve for x. 
Plugging in the given values, we have: 
3.4 = (x - 60) / 2 
Multiplying both sides by 2: 
6.8 = x - 60 
Adding 60 to both sides: 
x = 66.8 
Therefore, the answer is E) 66.8.

Suppose X Is a Normal Random Variable with Mean μ\muμ )Equal to 60 and Standard Deviation

Suppose X Is a Normal Random Variable with Mean $\mu$ )Equal to 60 and Standard Deviation