StatsCalc 1.9

This application offers a comprehensive approach to statistical analysis, catering to both novice and experienced users. It facilitates the computation of descriptive statistics for quantitative variables, performs a range of statistical tests, and calculates confidence intervals across various sample situations. In addition, it enables regression analysis using linear, exponential, and power-law models, while also providing tools to compute probabilities and quantiles for standard statistical distributions. Users can access features typically associated with handheld calculators, ensuring a practical experience. The accuracy of numerical results has been rigorously tested against Wolfram Mathematica, demonstrating reliability.

Features:

• Data Entry:
  • Facilitates simple list-based input for both quantitative and categorical data as well as two-way tables.
  • Supports voice-based data entry via Siri.
• One-Sample Methods:
  • Z-Test for the Mean
  • Z-Interval for the Mean
  • T-Test for the Mean
  • T-Interval for the Mean
  • Wilcoxon Signed Rank Test
  • Chi-squared Test for the Standard Deviation
  • Chi-squared Interval for the Standard Deviation
  • One-Proportion Z-Test
  • One-Proportion Z-Interval
  • Chi-squared Test for Goodness-of-Fit
• Two-Sample Methods:
  • Z-Test for Two Means
  • Z-Interval for Two Means
  • T-Test for Two Means (Assuming Equal Variances)
  • T-Interval for Two Means (Assuming Equal Variances)
  • T-Test for Two Means (Assuming Unequal Variances)
  • T-Interval for Two Means (Assuming Unequal Variances)
  • F-Test for Two Standard Deviations
  • F-Interval for Two Standard Deviations
  • Two-Proportion Z-Test
  • Two-Proportion Z-Interval
  • McNemar Test
• Multiple Sample Methods:
  • One-way ANOVA
  • Chi-squared Test for Independence
  • Cochran's Q-Test
• Correlation and Regression:
  • Two-Variable Descriptive Statistics
  • T-Test for Correlation
  • Linear Model Fit and Regression Analysis
  • Exponential Model Fit and Regression Analysis
  • Power-Law Model Fit and Regression Analysis
  • Spearman Rank Correlation
• Probability Theory:
  • Distribution Calculator: Includes methods for computing probabilities and quantiles across standard statistical distributions.
  • Calculates Mean, Variance, and Standard Deviation for a Discrete Random Variable.