InStat 3.1

Lingua: Ing 

S.O.: Win, Mac 





ADALTA è Importatore Ufficiale e Rivenditore Autorizzato per l'Italia per i prodotti GraphPad 



A less cumbersome alternative to typical heavyduty statistical programs
Most statistics programs are designed by statisticians, for
statisticians. These programs are featurepacked and powerful, but can
overwhelm scientists with thick manuals, obscure statistical jargon and
high prices. GraphPad InStat is different. InStat is designed by a
scientist for scientists. With InStat, even a statistical novice can
analyze data in just a few minutes. Try InStat for statistics without
all the fuss.


Why Choose InStat?
Five reasons why you should choose InStat:
InStat guides you step by step
InStat conquers the learning curve by escorting you through
statistical analyses. You'll master the program in just a few minutes –
really.
Clear analysis choices with explanations
You don't have to know the name of the test you need. InStat helps
you pick an appropriate test by asking questions about your data. If you
are unsure, consult the extensive help screens, which explain the
statistical reasoning in plain language.
Easy to understand results
InStat does not assume that you are a statistics whiz. It presents
results in simple paragraphs, with a minimum of statistical jargon.
InStat's help screens review the use of each test and explain every
portion of the results.
Unique analysis checklists
With other statistics software, it is too easy to get the right
answer to the wrong question. That's why InStat provides a unique
analysis checklist. Doublecheck that your data have not violated any
assumptions of the test, and that you have picked a test that matches
your experimental design and really answers the question you had in
mind.
A bargain
Most other statistics programs cost several hundred dollars, but
we've made InStat affordable for everyone. InStat costs only $149 for
single copies, with discounts for academic institutions and students.
Tour InStat
This overview, shown here in InStat Mac
(Windows is very similar), will demonstrate how easy it is to perform
oneway ANOVA using InStat in just a few minutes.
Step 1: Choose data format
Before you can enter data, you first have to tell InStat what kind of
data table you need. This important step makes InStat unique. Once
you've chosen the right kind of data table for your experiment, InStat
will be able to guide you to choose an appropriate statistical test.
InStat offers three goals on the top of the screen, with more choices
below. Based on your choices, you'll be able to perform different tests
as shown on the right. The three goals are distinct, and you shouldn't
have a problem telling InStat what kind of data you have.
For this example, we will select Compare means and Raw data.
Step 2: Enter data
Type, import or paste data onto InStat's data table. The Data menu
lets you transform data or create new variables by combining columns.
Note the six step buttons at the top of the program. You can use
these buttons to move from step to step in any order or you can use the
arrow buttons to move in sequence. The third button goes to the next
step, summary statistics.
Step 3: Summary statistics
For each column, view the mean, SD, SEM, confidence interval, etc. You can also enter the mean, sample size, and SD (or SEM) here if you have already analyzed data in another program.
Step 4: Select a statistical test
To guide you to select a test, InStat presents four questions. You
would see different choices if you entered a different number of columns
of data, or if you created a different kind of data table.
Based on the choice shown above, InStat tells you that it chose
oneway ANOVA with posttest. If you need guidance, click Help me choose
to view InStat's explanations.
Step 5: View the results
InStat presents the results using as little statistical jargon as possible.
The sixth step button shows a simple graph, suitable for getting the
sense of your data and to spot errors in data entry. You cannot change
or edit the graph, but can print it or copy it to the clipboard.
You don't have to follow the steps in order. When you edit data or
change analysis choices, InStat instantly recomputes the results.
Features/Specs
InStat system requirements
 Windows version – 486 or better, Windows 3.1 or higher, 4Mb RAM, 3Mb free hard disk space.
 Macintosh version – OSX
10.3 (Panther) or higher and 4Mb free hard disk space. InStat 3 Mac is a
native OS X (carbon) application. InStat Mac will not run under OSX
10.7 (Lion) or higher.
Cross platform compatible
InStat 3.1 is available both for Macintosh and Windows. The two
versions are very similar. You can open files created on one platform on
the other platform with no special conversion. The program has almost
identical interfaces on the two platforms, so you can switch back and
forth with virtually no learning curve.
Column statistics
 Mean, median, 95% CI, SD, SEM. Also tests whether the distribution conforms to a Gaussian distribution using the KolmogorovSmirnov test.
Group comparisons
 Paired and unpaired t tests; MannWhitney and Wilcoxon nonparametric tests.
 Ordinary and repeated measures ANOVA followed by Bonferroni, Tukey, StudentNeumanKeuls or Dunnett post tests.
 KruskalWallis or Friedman nonparametric tests followed by Dunn post test.
Contingency tables
 Chisquare test with or without Yates’ continuity correction.
 Chisquare test for linear trend.
 Fisher’s exact test.
 Calculate 95% confidence intervals for the relative risk, odds ratio or difference between two proportions.
 Calculate the sensitivity, specificity, positive predictive value,
negative predictive value and likelihood ratio with 95% confidence
intervals.
Linear regression and correlation
 Calculate slope and intercept with 95% confidence intervals.
 Force the regression line through a specified point.
 Interpolate from a standard curve.
 Calculate correlation coefficient (Spearman or Pearson) and its confidence interval.
 Test for departure from linearity with a runs test or the F test for linearity.
Multiple regression and correlation
 Calculate a correlation matrix.
 Multiple regression using selected X variables.
 For each X variable, compute its bestfit coefficient with standard
error and 95% confidence interval, and a P value testing whether the
variable contributes significantly to the model.
 Compute the Variance Inflation Factor (VIF) to test for multicollinearity.
Program features
 Up to 10,000 rows and 52 columns of data.
 Mathematically transform selected data (i.e., log, reciprocal, logit, etc.).
 Transpose rows and columns.
 Copy results or data to the clipboard, or export as a text file.
 Print graphs on any printer or export as Windows Metafile (.WMF) or PICT (Mac) files.
 Annotate your data and analyses using a builtin notes editor.
 InStat files contain analysis choices as well as data so you can quickly rerun the same test with new data.
 Combine 2 columns (add, subtract, multiply, divide) to create a new column.
 Import comma or tab delimited files.
 Import indexed (stacked) data, entire tables or selected rows and columns, filter selected data.
 Export the data table as a text table, or as indexed (stacked) file.
 Exclude selected values. They appear on the data table, but are treated as missing values by the analyses.
Graphing capabilities
InStat makes notebook quality graphs (not editable). For publication quality graphs, use GraphPad Prism.
What InStat does not do
We designed InStat to simply perform and teach basic statistical
tests. Many labs find that InStat is all they need. Other labs sometimes
require more advanced statistical tests, or the ability to select
subsets of data from large databases. These labs will need a heavyduty
statistical package in addition to InStat. InStat does not perform
twoway ANOVA or survival analysis, but Prism,
our graphing and curve fitting program, does. InStat also does not
perform logistic regression, stepwise multiple regression, factor or
cluster analysis, or ANCOVA.

