12. Video: Other Language Associated with Confidence Intervals

It is important to understand the way that your sample size and confidence level relate to the confidence interval you achieve at the end of your analysis.

Assuming you control all other items of your analysis:

1. Increasing your sample size will decrease the width of your confidence interval.
2. Increasing your confidence level (say 95% to 99%) will increase the width of your confidence interval.

You saw that you can compute:

1. The confidence interval width as the difference between your upper and lower bounds of your confidence interval.
2. The margin of error is half the confidence interval width, and the value that you add and subtract from your sample estimate to achieve your confidence interval final results.