Which formula would be used to determine the sample size using the formula for the standard error of the proportion?
A) $$n = \frac { \sigma ^ { 2 } z ^ { 2 } } { D ^ { 2 } }$$
B) $$n = \frac { \pi ( 1 - \pi ) z ^ { 2 } } { D ^ { 2 } }$$
C) $$\sigma _ { X } = D / z$$
D) A and C are correct

Question

Quizplus · Accepted Answer

The formula for determining the sample size using the standard error of the proportion is $$n = \frac { \pi ( 1 - \pi ) z ^ { 2 } } { D ^ { 2 } }$$, where $\pi$ is the estimated proportion, $z$ is the z-score, and $D$ is the desired margin of error.

Which Formula Would Be Used to Determine the Sample Size n=σ2z2D2n = \frac { \sigma ^ { 2 } z ^ { 2 } } { D ^ { 2 } }n=D2σ2z2​

Which Formula Would Be Used to Determine the Sample Size $n = \frac { \sigma ^ { 2 } z ^ { 2 } } { D ^ { 2 } }$