Suppose a Random Variable $x$ Is Best Described by a Normal Distribution With

Multiple Choice

Suppose a random variable $x$ is best described by a normal distribution with $\mu = 60$ and $\sigma = 4$ . Find the $z$ -score that corresponds to the value $x = 45$ .

A) $3.75$
B) $- 3.75$
C) $- 4$
D) 4