Sampling Size Calculation Now

Cochran’s formula is widely used for calculating sampling size in survey research:

\[n = rac{Z^2 ot p ot q}{E^2}\]

Suppose we want to conduct a survey to estimate the proportion of people who support a new policy. We want to achieve a margin of error of 5% and a confidence level of 95%. We expect the proportion of supporters to be around 50%. sampling size calculation