Release version 5.51.1

Released 2-Apr-2020
Version 5.51.1
Dual 32/64-bit installer (24.88 MB)
System requirements
  • Windows Vista, 7, 8, 10, & Server 2003, 2008, 2012, 2016
  • Excel 2007, 2010, 2013, 2016, 2019 and Office 365 (32 or 64-bit)
  • 2GB RAM, 50Mb disk space

Alternative download formats
.ZIP .MSI for Excel 32-bit .MSI for Excel 64-bit

 Installation instructions
 Concurrent-user installation instructions

Changes, bug fixes & improvements in this release:

Fit model

  • Probit regression (including features to perform CLSI EP17-A2 using Probit regression) (Fitting a simple probit regression, Estimating the detection limit using a probit fit)
  • Transform X and Y variable in simple regression


  • Transform variable


  • Predict variance at a given U for precision profile variance function
  • Improved handling of small negative numbers in fitting a precision profile variance function (thanks to Bill Sadler for his suggestions)
  • Hide excluded outliers in Variability plot

Method Comparison

  • Set seed in P&B bootstrap procedure
  • Log X-axis scale on difference plots

Reference Interval

  • Set seed in bootstrap procedures

Diagnostic test

  • Multiple prior probabilities for computation of predictive values.

See full release history

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