StatCalc for iPad

Use StatCalc to compare summary statistics, develop confidence intervals, explore common statistical tests, and verify hand calculations. A graphic display is provided to help visualize changes in confidence intervals and significance test results. StatCalc includes example data and a Statistics Guide for each module to help you quickly learn the procedures. Output is stored in an output log to view and e-mail the results.

Statistical Procedures

Frequencies: relative frequency table, goodness of fit, and ranking of categories (pareto sort)
Descriptives: count, sum, minimum, maximum, mean, median, range, population and sample variance and deviation, skewness, standard error, coefficient of variation
Weighted mean calculator: up to 8 means
Standardized (Z) Score generator
Confidence interval for means with adjustable confidence levels
Confidence interval for proportions with adjustable confidence levels and conversion from proportions to percent
Diagnostic accuracy for 2x2 tables: summary statistics include sensitivity, specificity, positive predictive value, negative predictive value, positive likelihood ratio, negative likelihood ratio
Chi-square Test of Independence: convert counts to row, column, and total percentages; up to a 3x3 table; includes Fisher Exact for 2x2 table
Chi-square Goodness of Fit: 1 to 8 categories
One-way ANOVA: 2 to 4 categories
Z-test of proportions: 1 and 2 sample tests
T-test of means: 1 and 2 sample tests
Z, T, Chi-square and F Distribution probabilities
Calculator: basic mathematical operations along with reciprocal, square, square root, factorial, natural log, and random number generator