Do One of the Following, as Appropriate: (A) Find the Critical

Multiple Choice

Do one of the following, as appropriate: (a) Find the critical value $z_{?/2}$ , (b) find the critical value $t_{?/2}$ , (c) state that neither the normal nor the t distribution applies
- $95 \% ; \mathrm { n } = 11 ; \sigma$ is known; population appears to be very skewed.

A) $\mathrm { z } _ { \alpha / 2 } = 1.96$
B) $t _ { \alpha / 2 } = 2.228$
C) Neither the normal nor the $t$ distribution applies.
D) $\mathrm { z } _ { \alpha / 2 } = 1.812$