### Technical Specifications

**One-variable displays:**

Histograms (rescale with mouse drag or specify classes), Normal Probability Plots, Bar Charts and Pie Charts.**Multiple Group Displays:**Dotplots and Boxplots.

Boxplots have the option to display 95% confidence intervals.**Two-variable displays:**

Scatterplots and Lineplots.**Multiple-variable displays:**

Scatterplot Matrix, Multiple Lineplots and Rotating Plots.

Rotating plots can display equations, even during rotation.**Special Plots:**

3D Rotating Surface Plot and Cluster Dendogram.**Non-Linear Smoothers:**

Lowess, Trewess and Running Median.**Regression Lines:**

Drawn on scatterplots for the entire dataset or separate for different categories.**Scatterplot Overlays:**

Plot several variables on the same scatterplot, without sacrificing speed or interaction.**Plot Tools and features:**- Palette of 12 plot tools that work in all plots. Plot tools

include: pointer, lasso, brush, slice, identify, refocus,

rescale, lines, rectangle selection. - Palette of 64 colors. Colors can be assigned to represent

different categories or the rank of continuous data

values. - Palette of 8 plot symbols. Symbols can be assigned to

represent different categories.

- Palette of 12 plot tools that work in all plots. Plot tools
- All plots link so that points selected in one plot instantly

highlight in all others. Identify any point by clicking on it.

Select subsets of points and restrict analyses to those

points.

#### Statistics:

**Summary Statistics**

for individual variables, broken down by categories and saved

as variables: mean, median, midrange, midquartile range, biweight,

standard deviation, variance, population standard deviation, standard error,

interquartile range, range, sum of squares, sum, count, skewness, kurtosis,

order statistics, rank, minimum and maximum.**Frequency Tables and Contingency Tables**

with Chi-Square and Fisher’s Exact Test, expected values, standardized residuals,

cumulative statistics and percents.**Standard Tests and Confidence Intervals**,

including z-tests, t-tests, two-sample t-tests, paired t-tests, pooled

t-tests, F-tests and a Chi-Square test of individual variances.**Nonparametric Tests:**

Sign, Paired Sign, Wilcoxon Signed Rank and Mann-Whitney U. Option to include or remove ties.**Correlation:**

Pearson Correlation, Spearman Rank Correlation, Kendall’s Tau and Covariance.**Regression:**- Simple Regression, Multiple Regression, Weighted

Regression, Polynomial Regression, Stepwise Regression. - Full suite of diagnostic plots and statistics, all linked

to update automatically if the data are changed. - Diagnostics include: residuals — internally and externally

studentized, leverage, predicted values, DFFits, Cook’s

distance, Hadi’s Influence and Likelihood. - Special diagnostic plots include partial regression plots,

potential-residual plots, scatterplots of predicted values vs.

residual and normal probability plots of all diagnostic

statistics. - Drag new response and predictor variables into the

regression or remove them with mouse clicks; diagnostic

statistics and plots update as well.

- Simple Regression, Multiple Regression, Weighted
**Nonlinear Regression:**- Fit virtually any function.
- Interactive visual tools help you find starting values and

test the sensitivity of your results. - Pre-built templates include: Exponential, Power, Growth, S,

Log, Inverse, Quadratic, Cubic, or customize your own

template.

**ANOVA:**

Special one-step command to compute One-way and Multi-way, balanced or unbalanced,

ANOVA and ANOVA with interactions.**General Linear Model:**- N-way ANOVA, ANCOVA, MANOVA, MANCOVA and Repeated

Measures. - Fixed effect, random-effect and mixed models.
- Unbalanced designs, nested designs, designs with missing

cells and weighted analyses. - Results include a complete ANOVA table, a cell means table

and a coefficients table. - Full set of diagnostic statistics and plots.
- Post-Hoc tests, including Scheffé, Bonferroni

and Least Significant Difference. - Modify the data, factor type or model and recompute the

analysis in place. - Unique overview table for multivariate models.
- Multivariate tests for MANOVA models include Pillai’s

trace, Wilk’s Lambda, Hotteling-Lawley trace and Roy’s Maximum

root.

- N-way ANOVA, ANCOVA, MANOVA, MANCOVA and Repeated
**Logistic Regression**,

including support for discrete factors, interaction terms and unbalanced designs, likelihood,

coefficients and Wald statistics.**Cluster Analysis**

with single or complete linkage clustering and interactive dendogram.**Principal Component Analysis:**- Saves principal axes as equation so “nearby” versions

with simple coefficients are easy to find. - Computes a summary table and variables that hold the

eigenvalues, eigenvectors and orthogonal basis vectors.

- Saves principal axes as equation so “nearby” versions
**Transformations:**- More than 100 functions which include rounding, arithmetic,

logical, summary, exponential, trigonometric, probabilities and

many others. - Select simple transformations from menus or type in

arbitrary complex functions, including IF/THEN/ELSE. - Transformed variables recompute automatically if the data

are changed, so they are always up-to-date. - Pre-fabricated, user-controlled, dynamic transformations

include a Box-Cox transformation, Mix X and Y, Tukey’s Lambda

and Dynamic Lag.

- More than 100 functions which include rounding, arithmetic,

#### Special Features:

**Unlimited number of cases and variables.****System 7 Savvy:**

shares data and selection sets with the GeoQuery® geographic information management package.**HyperView® menus**offer expert, context-sensitive

suggestions.**Action language:**- Automate calculation and implement new functions beyond the

standard Data Desk menus. - Easy-to-use, object-based programming interface.
- Many standard programming commands including: Let Y:=X, If,

If else, While, Repeat, Loop, Done, Block, Abort, Call,

Initialize, Update, Case Attributes, Random, Interface and

more.

- Automate calculation and implement new functions beyond the
**Templates:**- Create pre-built analyses for use with other data.
- Incorporate drag and drop interface, push button controls

and notes for annotation and instruction. - Efficient and flexible data management with relational

structure including random sampling, transposing, sorting,

ranking, generating patterned data, generating random numbers,

replicating, appending, splitting variables by group, variable

tables and scalar tables.

**Consistency and Updating:**- Windows offer to update if the underlying data are

changed. - Allow viewing before vs. after side-by-side.

- Windows offer to update if the underlying data are
**Data Importing:**- Copy and Paste from spreadsheets, word processors, database

programs and others. - Read ASCII text files with arbitrary delimiters and Fixed

Format files. - Combine Data Desk files: import the contents of a saved

Data Desk file into another open file. - Combine data, analyses, and derived variables.

- Copy and Paste from spreadsheets, word processors, database
**Exporting:**- Export data (as ASCII text tables), plots (in color PICT or

bitmap format) and computed results (as tab-delimited text or

PICT). - Compact datafiles dramatically reduces the size of

datafiles to make them easier to store and share with

others.

- Export data (as ASCII text tables), plots (in color PICT or
**Graphical Control:**

Customized graphical controls so you can build your own dynamic graphics.**Full control over Font, Size and Scaling**

for all plots and tables (Mac Only).**Preferences file**to save defaults.**Selector button**allows subset analysis.**Group button**allows parallel category analysis.**HotSet variables**

allow subsets and categories to be changed dynamically.**Colors**can be added to any display by group if the

variable is discrete or by rank if the variable is

continuous.**Symbols:**assign any plot symbol to the selected points

in the plot. Data plotted with that symbol will show this symbol

in all other plots.**Slide Show Presentations**let you step through sets of

windows, including text windows that provide commentary and

advice.**Notebook Windows:**Record history of analysis, group

plots and text together for printing. Plots and tables placed into

notebook are time-stamped and linked to original analyses.**Documentation:**Tutorial Quickstart Guide, Handbook and

Statistics Guide written by a statistics professor. All contain

complete discussions of the statistical methods, examples (with

data included), instructions and a full index.**Extremely fast computations and display.****The application takes up**about 7 MB of disk space.

Total installation is 20 MB.- Data Desk 8.1 for Mac runs on OS X 10.9, 10.10, 10.11, 10.12, 10.13 and 10.14.
- Data Desk 8.1 for Windows can be used with computers running Win7, Win8 and Win10.
**Comprehensive Help system.****Free**technical support for registered users.