User:Consensio/sandbox

Stats Pad is a computer program that was developed by Jon Daley and to perform simple and complex statistical analyses using Apple Inc's iOS operating system on iPad, iPhone, and other iOS devices. Stats Pad is focused primarily on educational use for statistics classes and can also be used for many business and engineering applications. Stats Pad comes in two versions: the full "Stats Pad" version which has all features enabled, and the "LE" version that has a few free features with in-app purchases to enable the other analyses.

Features
The following features are available in version 1.6

Graphing:
 * Bar Chart
 * Box Plots (including outliers)
 * Histograms (from raw data)
 * Line Charts
 * Pie Charts
 * XY Scatter Plots including trend line fit and equations!

Descriptive:
 * Correlation Matrix (including T-Test statistics)
 * Covariance Matrix (Sample and Population based)
 * Descriptive Statistics

General Hypothesis Tests:
 * Single Sample T-Test for mean
 * Single Sample Z-Test for mean
 * Paired T-Test (Two Samples)
 * Pooled Variance T-Test (Two Samples)
 * Separate Variance T-Test (Two Samples)
 * Two Sample Z-Test
 * Chi-Squared Test for Variance
 * F-Test for Two Sample Variance
 * Single proportion
 * Two proportion difference

Chi Square Tests:
 * Contingency Analysis (test for independence)
 * Goodness of Fit Test

Non-Parametric Tests:
 * Wilcoxon Signed Rank Test
 * Mann-Whitney U-Test
 * Wilcoxon Matched Pair Signed Rank Test
 * Kruskal-Wallis One-Way ANOVA

Regression:
 * Simple and Multiple Regression with residuals
 * Function fit including Polynomial, Exponential, Log, and Power

ANOVAs:
 * One-Way ANOVA
 * Randomized Block ANOVA
 * Two-Factor ANOVA

Confidence Intervals
 * Single mean known population sigma
 * Single mean unknown population sigma
 * Two mean difference known sigma
 * Two mean difference unknown sigma (pooled or separate variance)
 * Variance
 * Single proportion
 * Two proportion difference

Distributions – Cumulative and Inverse
 * Normal Distribution
 * T Distribution
 * Chi-Square Distribution
 * F Distribution
 * Exponential Distribution
 * Binomial Distribution
 * Poisson Distribution