What is Quadstat?

Quadstat is a free online statistical analysis tool.
Quadstat is a free repository for storing and sharing data.
Quadstat is also a statistical application framework for designing new web apps like the ones found here.

Who uses Quadstat?

High school statistics students may find the apps particularly useful along with the free Open Intro AHSS textbook.
Quadstat may be useful to college and graduate students who are taking introductory statistics courses.
Statistics enthusiasts and professionals are welcome to try out the open-source Quadstat Drupal distribution to create dynamic websites.

How do I get started ?

All apps and data are listed on tabs to the right.
All output generated with a Quadstat account remains private. Users may keep data private (unpublished) when saving or editing a dataset.
Sign in to start uploading your own data for analysis.
Name Description
Arithmetic Mean (Average)
Computes the arithmetic mean (average) of a sample.
Barplot for Contingency Table
Creates a bar plot with vertical (stacked) bars for a contingency table.
Barplot for Count Data
Plots a single count variable barplot in R.
Bivariate Plot
Plot wo variables on the coordinate axes.
Create (side-to-side) box-and-whisker plot(s) of the given (grouped) values.
Contingency Table For Categorical Data
Provides a contingency table for a dataset or vector.
Correlation Coefficient
Compute the Pearson correlation coefficient of two or more variables.
Cumulative Frequency Histogram
This type of histogram shows cumulative (total) frequency achieved by each bin, rather than the frequency in that particular bin. Each bin will be of equal height or taller than the bin immediately preceeding it.
Create a dotchart (dotplot) based on a dataset vector
Computes the IQR (interquartile range.)
Name Authored by Filename File size Changed Authored on File MIME type
Gender and Politics admin dataset-79160.csv 49 bytes June 13, 2017 - 2:31 PM June 12, 2017 - 1:58 PM text/csv
heartTr admin dataset-59284.csv 3.99 KB June 12, 2017 - 10:31 AM June 12, 2017 - 10:27 AM text/csv
Heights and GPA admin dataset-12871.csv 291 bytes June 7, 2017 - 4:44 PM June 7, 2017 - 4:42 PM text/csv
county admin dataset-47806.csv 253.4 KB May 29, 2017 - 2:18 PM May 29, 2017 - 1:58 PM text/csv
email50 admin dataset-81559.csv 3.95 KB May 29, 2017 - 2:18 PM May 27, 2017 - 9:43 AM text/csv
stent30 admin dataset-61804.csv 9.61 KB May 12, 2017 - 8:37 PM May 7, 2017 - 4:25 PM text/csv
stent365 admin dataset-22611.csv 9.56 KB May 7, 2017 - 4:38 PM May 7, 2017 - 12:27 AM text/csv
Uniform(0,100) admin dataset-40927.csv 334 bytes June 12, 2017 - 12:32 AM May 1, 2017 - 9:21 AM text/csv
Airline Safety admin dataset-41414.csv 2.34 KB March 29, 2017 - 4:58 PM March 29, 2017 - 4:51 PM text/csv
White House Staff Salaries 2011 - 2016 admin dataset-17938.csv 285.19 KB May 12, 2017 - 8:39 PM March 28, 2017 - 9:29 PM text/csv