Alphabetical List of Features
U
- U control chart for attributes—quality control, Control Chart
- uncertainty—measured as total loglikelihood
- Uniform—method of generating a space filling design (DOE), Space Filling Design
- uniform precision—DOE, Response Surface Design
- uniformly weighted moving average chart—UWMA Control Charts
- univariate repeated measures—with sphericity test and degree of freedom adjustments (Greenhouse-Geisser and Huynh-Feldt), Fit Model Manova
V
- V Mask—see cumulative sum plot, Control Chart
- Van der Waerden test— nonparametric test that k samples have equal means, Fit Y by X oneway
- variability analysis—variance component estimates, Gage R&R reports and plots, Variability/Gage Chart
- variance component estimates—random effects model specify one or more effects as random (see also mixed models), handles unbalanced designs, Fit Model SLS
- variance homogeneity—tests that the group variances are the same in a one-way ANOVA (see also Welch ANOVA, and O’Brien’s, Brown-Forsythe’s, Levene’s, and Bartlett’s test of homogeneity), Fit Y by X oneway
- varimax rotation—rotated components, Spinning Plot
- variogram—diagnostic for time series modeling, Modeling > Time Series
W
- Wald Chi-square test—logistic regression, Fit Y by X logistic
- Weibull analysis—nonlinear regression with appropriate loss function, (see also loss function templates) Modeling > Nonlinear
- Weibull fitting—fits a Weibull 2- or 3- parameter Weibull distribution to data, Distribution
- Weibull survival curve—Survival and Reliability > Fit Parametric Survival
- Welch ANOVA— one-way ANOVA when there is non-homogeneity of variance, Fit Y by X oneway
- Western Electric Rules (tests for special causes)—quality control, Control Chart
- Westgard rules (tests for special causes)—quality control, Control Chart
- white noise tests—tests whether a time series is white noise, the Fisher-Kappa and BKS statistics are calculated for spectral density plots, Multivariate > Time Series
- Wilcoxon rank sum—two sample rank test equivalent to Mann-Whitney (see also Kruskal-Wallis for k samples), Fit Y by X oneway
- Wilcoxon signed-rank nonparametric test of mean, in matched pairs, tests the difference between two columns is zero, Distribution and Matched Pairs
- Wilcoxon test—survival analysis, Survival and Reliability > Survival/Reliability
- Wilk’s lambda—approximate F test for multivariate analysis of variance Fit Model Multivariate
- Winters method time series forecasting—(see time series modeling)
Z
- z test—compare single Mean to a value, Distribution
- zone lines—zones for control charts, used with tests for special causes (see Western Electric Rules)
- zooming—use the magnifier glass tool to zoom in or out on any subset of a plot
