A random variable X is normally distributed with ì = 60. Convert the value of X to a z-score, if the standard deviation is as given.

X = 60; ó = 7
A) 7
B) 1
C) 60/70
D) 0

To convert a value of a random variable X to a z-score, we can use the formula:

z = (X - μ) / σ

where z is the z-score, X is the value of the random variable, μ is the mean of the distribution, and σ is the standard deviation of the distribution.

In this case, X = 60, μ = 60, and σ = 7. Plugging these values into the formula, we get:

z = (60 - 60) / 7 = 0

So, the z-score for X = 60 is 0.

Therefore, the correct answer is D) 0.