The Sampling Distribution Of $\bar { p } _ { 1 }$

Multiple Choice

The sampling distribution of $\bar { p } _ { 1 }$ - $\bar { p } _ { 2 }$ is approximated by a

A) normal distribution.
B) t distribution with n₁ + n₂ degrees of freedom.
C) t distribution with n₁ + n₂ - 1 degrees of freedom.
D) $\bar { p } _ { 1 }$ - $\bar { p } _ { 2 }$ distribution.