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Glossary
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C
certainty - The probability that a confidence interval contains the population parameter.
confidence interval - Under repeated sampling the proportion of confidence intervals that would contain the population parameter.
confidence level - Under repeated sampling, the proportion of confidence intervals that would contain the population parameter.
I
inferential statistics - Statistics that examine whether information from a sample can be generalized to a population.
M
margin of error - The amount of error above and below the point estimate of the population parameter caused by sampling variability.
P
point estimate - A single value estimate (e.g., mean, proportion) of a population parameter.
population parameter - A statistic (such as a mean or proportion) for a population.
precision - The width, or range, of a confidence interval.
proportion - Percentage expressed as a decimal between 0 and 1.0.
T
t-Distribution - A family of bell-shaped probability distributions that can be used to find probabilities at specified values or ranges of values for variables that follow this distribution.
