Moderate# Single Proportion Conditions

APSTAT-1VJ6WK

When using normal calculations involving sampling proportions, which of the following conditions must be met?

I.The population must be at least $10$ times the sample.II.$np$ and $n (1-p)$ must both be greater than $10$, where $n$ is the sample size and $p$ is the proportion of success.III.The sample size must be over $30$.