Introduction
ProStats is a graphically-oriented data analysis program that provides fast, convenient, and solid answers to anyone doing statistical calculations. If you are a student, teacher, engineer, scientist, or research professional -- ProStats will help you collect and analyze your data while on the go. Results are displayed numerically and graphically to provide you exact values as well as trends in the data.
History
ProStats 1.0 traces its roots to ProStats for the Palm device, first released in 2001. This version was widely distributed and became very popular in the scientific and academic communities. Many of the features included in the original version evolved as a result of requests made by its users. These features and functions have been included in the current version with significant enhancements. ProStats has been completely rewritten in optimized C-code using the original program as a reference.
Features and Functions:
- ProStats is the most complete stats app for the iPhone with new features being added with every update.
- Spread sheet interface for data entry and editing.
- Statistical calculations include: Mean, Standard Deviation, Median, Standard error of the Mean (SEM), Variance, Minimum, Maximum, Range, and Sum.
- Non-parametric tests: Mann–Whitney U Test, Kruskal-Wallis one-way ANOVA, Chi-Squared Goodness-of-fit.
- ANOVA with post-hoc analysis.
- 2x2 Contingency Table: Fisher's Exact Test, Chi-Squared, Odds Ratio, Relative Risk.
- Regression analysis includes linear and polynomial curve fitting, plotting, and interpolation using a very robust least-squares algorithm.
- Tracking Cursor for plots and regression screens.
- File sharing via WiFi network.
- Histogram and Box and Whisker Plots.
- Hypothesis testing may be done, and test results displayed graphically.
- p value of Student’s t-tests is displayed along with the critical t and critical value.
- Confidence Intervals are calculated for the means of the data sets.
- Sample Size Calculator.
- T table and p value calculator.
Any comments or observations are greatly welcome. ProStats will be updated, improved and features added based on user comments.
References
The calculations used in ProStats have been derived from the following texts:
Glantz, S. A., Primer of Biostatistics, 5th ed. New York: McGraw-Hill, 2002.
Bevington, R., and Robertson, D., Data Reduction and Error Analysis for the Physical Sciences, 2nd ed. New York: McGraw-Hill, 1992.
Crow, E., Davis, F., and Maxfield, M., Statistics Manual, New York: Dover, 1960.