$\mu = 54 , \sigma = 32 , n = 64$

Multiple Choice

$\mu = 54 , \sigma = 32 , n = 64$

A) $\mu \frac { \ } { x } = 54 , \sigma \frac { } { x } = 4$
B) $\mu _{\bar { x }} = 54 , \sigma_{ \bar { x } }= 32$
C) $\mu _{\bar { x }} = 54 , \sigma _{\bar { x }} = 0.5$
D) $\mu _{\bar { x }}= 6.75 , \sigma _{\bar { x }}= 4$