Sample Size Calculations. If you were taking a random sample of people across the u s then your population size would be about 317 million. The type i error alpha.
Choose the required confidence level from the dropdown menu input the margin of error input the proportion of the total population if required specify the population size click on the calculate button to generate the results. The type i error alpha. N is population size.
To do this use the confidence interval equation above but set the term to the right of the sign equal to the margin of error and solve for the resulting equation for sample size n.
Here are three key terms you ll need to understand to calculate your sample size and give it context. The total number of people in the group you are trying to study. The equation for calculating sample size is shown below. If you were taking a random sample of people across the u s then your population size would be about 317 million.
