NCSS Documentation

Use the links below to load individual chapters from the NCSS documentation in PDF format. The chapters correspond to the procedures available in NCSS. Each chapter generally has an introduction to the topic, technical details, explanations for the procedure options, and examples. Each of these chapters is also available through the NCSS help system when running the software.

Jump to topic:

Quick Start

Introduction

Data

Analysis

ANOVA

Appraisal

Cluster Analysis

Correlation

Correlation (Pearson, Spearman, Kendall’s Tau)

Correlation and Linear Regression

Correlation Matrix

Point-Biserial and Biserial Correlations

Box-Cox Transformation for Simple Linear Regression

Canonical Correlation

Cronbach’s Alpha in Item Analysis

Bland-Altman Plot and Analysis

Lin’s Concordance Correlation Coefficient

Circular Data Correlation

Curve Fitting

Descriptive Statistics

Design of Experiments

Diagnostic Tests

Distribution Fitting

Beta Distribution Fitting

Distribution (Weibull) Fitting

Gamma Distribution Fitting

Grubbs’ Outlier Test

Normality Test

Probability Plots

Forecasting

Item Analysis

Meta-Analysis

Method Comparison

Mixed Models

Multivariate Analysis

Nondetects Data

Nonparametric

Wilcoxon Signed-Rank Test

Mann-Whitney U / Wilcoxon Rank-Sum Test

Sign Test

Kruskal-Wallis Test

Conover Equal Variance Test

Dunn’s Test

Randomization Tests

Friedman’s Test

Cochran’s Q Test

Kendall’s Tau Correlation

Spearman-Rank Correlation

Nondetects-Data Group Comparison

Analysis of Runs

Operations Research

Proportions

Quality Control

Reference Intervals

Regression

Simple Linear Regression

Multiple Regression

Logistic Regression

Cox Regression

Count Data

Method Comparison

Nondetects-Data Regression

Nonlinear Regression

Survival Data

Subset Selection

Time Series

Two-Stage Least Squares

Reliability

ROC Curves

Survey Data

Survival Analysis

Time Series

T-Tests

Two-Way Tables

Graphics

Graphics Components

Bar Charts

Bland-Altman Plot

Box Plots

Circular Data Plots

Circular Histograms

Rose Plots

Pie Charts

Contour Plots

Curve Fitting

Dendrograms

Density Plots

Dot Plots

Error-Bar Charts

Forecasting

Time Series Plots

Autocorrelation Plots

Cross-Correlation Plots

Data Plots

Decomposition Ratio Plots

Forecast Plots

Lag Plots

Partial Autocorrelation Plots

Periodograms

Runs Charts

Serial Correlation Plots

Spectrum Plots

Forest Plots

Function Plots

Histograms

Kaplan-Meier Curves (Survival)

Line Charts

Mosaic Plots

Percentile Plots

Pie Charts

Probability Plots

Quality Control Charts

ROC Curves

Scatter Plots

Stem-and-Leaf Plots

Surface Plots

Time Series

Time Series Plots

Autocorrelation Plots

Cross-Correlation Plots

Data Plots

Decomposition Ratio Plots

Forecast Plots

Lag Plots

Partial Autocorrelation Plots

Periodograms

Runs Charts

Serial Correlation Plots

Spectrum Plots

3D Plots

Tools

Calculators

Data

Macros

References

Start Your Free 30 Day Trial Now Buy Now

"We have used your product for almost 20 years... It has been a vital part of the research initiatives we have conducted over the years. Through each version of NCSS, we have been able to count on its user-friendly design, broad range of statistical tools and a high level of very personalized customer support..."

Dr. George Ebra, Dr. Debra Guest, Research

Your support is always amazing. I also run [another statistical software package] and on a support / admin basis you guys are way ahead.

Neale Penman, Researcher