We are pleased to announce the release of NCSS 2021, the latest edition of our statistical analysis and graphics software. We are confident you will find the improved and newly added procedures highly suitable for your research needs.
For the new group-sequential analysis procedures in NCSS 2021, there are corresponding group-sequential power and sample size procedures in PASS 2021.
New Procedures in NCSS 2021
Violin Plots
Violin Plot Example
Group-Sequential Tests (Efficacy/Futility Boundary Options, Sample Size Re-estimation)
For each of these group-sequential analysis and sample-size re-estimation procedures, there are corresponding group-sequential power and sample size procedures in PASS 2021.
Group-Sequential Analysis Input Example
Group-Sequential Analysis Output Example
Sample Size Re-Estimation Output Example
Updated and/or Improved Procedures in NCSS 2021
These procedures have been updated to improve functionality and flexibility.
Random Seed
For all procedures that utilize random number generation, a Random Seed option was added, to obtain output reproducibility.
Line Charts Added to Several Procedures
For each of these procedures, the option to produce line charts was added.
Line Chart Example
Label Sorting and Improved Data Orientation Options
The ability to order the labels was added, as well as an improved data orientation option, for the following procedures.
Overall Regression Line
The ability to add an overall regression line was added to the following procedures.
Overall Regression Line Example
Residual Normality Tests
The following Normality tests of the residuals were added to the One-Way ANOVA procedure.
Exact Binomial McNemar Test
The Exact Binomial McNemar Test was added to the Two Correlated Proportions (McNemar Test) procedure.
Machine Zero in Mixed Models Procedures
The Mixed Models procedures were updated to allow the local setting of the machine zero, so that the local machine zero can override the global machine zero. This allows local control of the machine zero when attempting to obtain model convergence.
Enhancements
Variable Labels and Value Labels
A much-improved system for the use of variable labels and value labels was implemented system-wide.
Report Auto-sizing
A program-wide auto-sizing of report columns was integrated, giving improved column spacing in reports.
Output Example (Before)
Output Example (After)
Group By System
The new Group By system allows any analysis to be run independently for each value of the designated Group By column(s).
Group By System Setup Example
Group By System Result Example
With the Group By system active, a separate run is made for each level of Iris.
Data Fill Tool
The Data Fill tool was updated to save the current settings when the window is closed.
Window Access Improvements
Improved access to various controls is given for the following scenarios.
Window Loading Time
Some optimization techniques were employed to improve the loading time of various windows.
Compatibility
NCSS 2021 is fully compatible with Windows 10, 8.1, 8, 7, and Vista SP2, on both 32-bit and 64-bit operating systems.
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