Solve the Problem $\mathrm { z }$ Scores Are Normally Distributed with a Mean of 0 and Are

Multiple Choice

Solve the problem.
-Assume that $\mathrm { z }$ scores are normally distributed with a mean of 0 and a standard deviation of 1 . If $\mathrm { P } ( - \mathrm { a } < \mathrm { z } < \mathrm { a } ) = 0.4314$ , find $\mathrm { a }$ .

A) $1.49$
B) $0.57$
C) $- 0.18$
D) $0.3328$