Title: NEDARC - Confidence Intervals
Headings: Confidence Intervals
Confidence Intervals
Remember that there is variability associated with your outcomes and statistics.
Let's Look at an Example:
Providing a Range of Values
Sample Size and Variability

Content: A larger sample size or lower variability will result in a tighter confidence interval with a smaller margin of error. A smaller sample size or a higher variability will result in a wider confidence interval with a larger margin of error. The level of confidence also affects the interval width. If you want a higher level of confidence, that interval will not be as tight. A tight interval at 95% or higher confidence is ideal. Examples: Average Scene Time = 5.5. mins; Standard Deviation = 3 mins; N = 10 runs
95% Confidence Interval = (3.6, 7.4)
Margin of Error = ±1.9 minutes
Average Scene Time = 5.5 mins;