COLLAPSE

What is your understanding of confidence interval estimation?

We use the sample mean Xbar Margin of Error to estimate the population mean. We can only say that we are 90, 95, or even 99% confident that the population mean is somewhere within the interval;

We use sample proportion Pbar Margin of Error to estimate the population proportion. We can only say that we are 90, 95, or even 99% confident that the population proportion is somewhere within the interval;

Does that mean Population mean or proportion changes or moves or varies? Explain your reasoning.

Can the Vaccine development or clinical trial for the covid vaccines be the hypothesis testing?

What is the Null and Alternative hypothesis?

What is the p-value used in these clinical trials?