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Confidence Intervals definitions

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  • Confidence Interval
    An estimated range, based on sample data, within which a parameter is expected to lie at a specified confidence level.
  • Mean
    The arithmetic average of a set of measurements, serving as the central value in statistical calculations.
  • Standard Deviation
    A measure of the spread or variability of a set of data points around their average value.
  • Student's t
    A statistical value from the t-distribution used to account for sample size when estimating intervals.
  • Degrees of Freedom
    The number of independent values in a calculation, found by subtracting one from the total number of measurements.
  • Confidence Level
    The probability, expressed as a percentage, that a parameter lies within the calculated interval.
  • Parameter
    A numerical value that describes a characteristic of a population, such as its mean.
  • Sample
    A subset of data collected from a population, used to estimate population characteristics.
  • t-Value
    A multiplier from the t-distribution table, determined by degrees of freedom and confidence level.
  • Measurement Uncertainty
    The inherent doubt or variability present in any experimental data collection process.
  • Population
    The entire group from which a sample is drawn and about which conclusions are made.
  • Interval Estimate
    A range calculated from sample data that is likely to contain a population parameter.
  • Statistical Table
    A reference chart providing values, such as t-values, needed for statistical calculations.
  • Range
    The span between the lowest and highest values in a set, or the width of an interval estimate.