The Sampling Distribution of Is Approximated by A $\bar { p } _ { 1 } - \bar { p } _ { 2 }$

Multiple Choice

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

A) normal distribution
B) t-distribution with n1 + n2 degrees of freedom
C) t-distribution with n1 + n2 - 1 degrees of freedom
D) t-distribution with n1 + n2 + 2 degrees of freedom