1. Statistical Reference Guide

Reference Interval / Range (CLSI EP28) in Excel A reference interval (sometimes called a reference range or normal range) describes the range of values of a measured quantity in healthy individuals.

  • Reference limits
    A reference limit defines a value where a given proportion of reference values are less than or equal to. A reference interval defines the interval between a lower and upper reference limit that includes a given proportion of the reference values.
  • Histogram
    A histogram shows the distribution of the data to assess the central tendency, variability, and shape.
  • Box plot
    A box plot shows the five-number summary of the data – the minimum, first quartile, median, third quartile, and maximum. An outlier box plot is a variation of the skeletal box plot that also identifies possible outliers.
  • Normal probability (Q-Q) plot
    A normal probability plot, or more specifically a quantile-quantile (Q-Q) plot, shows the distribution of the data against the expected normal distribution.
Available in
Method Validation Edition Medical Edition Ultimate Edition

From the Statistical Reference Guide for Analyse-it 6.24.0: https://analyse-it.com/docs/user-guide/reference-interval

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