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Mathematical Measurements definitions

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  • Phenotype
    Observable trait or characteristic measured and analyzed in genetic studies, such as height, weight, or spot number.
  • Population
    Entire group of individuals being measured, like all humans in a region or all members of a species.
  • Sample
    Representative subset of a population used to estimate characteristics when measuring the whole group is impractical.
  • Population Mean
    Average value calculated from all individuals in a group, reflecting the central tendency of a trait.
  • Sample Mean
    Average value derived from a subset, used to estimate the central tendency of the entire population.
  • Variance
    Quantifies how much individual values differ from the mean, indicating the spread of a trait in a group.
  • Covariance
    Measures the degree to which two traits vary together within a group, revealing shared variation.
  • Standard Deviation
    Indicates the typical amount by which values differ from the mean, derived as the square root of variance.
  • Standard Error
    Estimates the accuracy of a sample mean by considering how well it represents the entire population.
  • Normal Distribution
    Bell-shaped curve showing how trait values are distributed, with most values clustering around the mean.
  • Frequency Histogram
    Graphical representation displaying how often different values of a trait occur within a dataset.
  • Range
    Span between the lowest and highest values observed for a trait, indicating the extent of variation.
  • Trait
    Specific measurable characteristic, such as tail length or head size, analyzed in genetic studies.