A confidence interval is a range of values, derived from sample data, that is likely to contain the population mean. It provides an estimate of the uncertainty surrounding that mean.
5 Must Know Facts For Your Next Test
A confidence interval for a single population mean using the Student t distribution accounts for small sample sizes.
The width of the confidence interval depends on the standard deviation, sample size, and confidence level.
As the sample size increases, the t-distribution approaches a normal distribution.
The critical value from the t-distribution varies based on degrees of freedom and desired confidence level.
Commonly used confidence levels are 90%, 95%, and 99%.
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Related terms
Student t Distribution: A probability distribution used in statistical inference for estimating population parameters when the sample size is small.