Art of Stat vs PixelMath

********** News: The Inference app is now part of the all new "Art of Stat" app, a single app that contains Inference and seven other modules (Explore Data, Distributions, Concepts, Regression, Machine Learning, Resampling and Data Editor) Please consider getting the Art of Stat app for the latest updates and features from the App Store. Simply search for "Ar of Stat" on the App Store. This app will continue to work, but future development is concentrated on the new Art of Stat app. ********* Statistical calculator for inference (confidence intervals and hypothesis tests) about proportions and means. The Art of Stat: Inference app provides: - Inference for Proportions + one sample (z-test) + two independent samples (two sample z-test) + two dependent samples (McNemar) - Inference for Means + one sample (t-test) + two independent samples (two-sample t-test) + two dependent samples (paired t-test) + several means (One-way ANOVA) - Chi-Square Test + Goodness of Fit (one sample) + Independence/Homogeneity (contingency table) - Data Editor + Create or edit datasets Unlock all modules for a one-time small fee! Entering your own data is easy: If you just have a few observations (or if you have the summary statistics), simply type them in. For larger datasets, upload a CSV file of your raw data to a cloud account (such as iCloud or Google Drive) or email the file to yourself and save it on your device. Then, open the CSV file in the app and select the variables for your analysis. You can also simply copy & paste raw data from a spreadsheet app (such as Numbers on iOS or Google sheets). To illustrate all methods, several example datasets are provided for each procedure. The results are stunning: The app provides relevant plots (side-by-side or stacked bar charts, boxplots, histograms) and computes and visualizes confidence intervals and P-values for testing hypotheses. All relevant information (such as standard errors, margin of errors, z- or t-scores and degrees of freedom) are clearly displayed and labeled. The P-value is visualized on a graph for the normal, t-, Chi-Squared or F-distribution. Developed for both students and teachers as a handy tool for carrying out basic statistical inference and visualize results on the fly. The app works in on- and offline mode (the app indicates that it is in offline mode with a large green banner), which makes it suitable for exams. Easily share your results by taking screenshots.

Build confidence for the Digital SAT® Math section with focused practice, concise solutions, and guided examples that help you understand each problem-solving method. PixelMath organizes practice by skill, making it easy to focus on specific topics, recognize common question patterns, and learn efficient ways to solve problems. PRACTICE THE FOUR MATH DOMAINS • Algebra • Advanced Math • Problem-Solving and Data Analysis • Geometry and Trigonometry FEATURES • Topic-Based Practice Work on linear equations, functions, quadratics, percentages, statistics, circles, triangles, volume, trigonometry, and more. • Concise Step-by-Step Solutions Review clear solutions designed to show an efficient path from the question to the answer. • Guided Similar Examples When you need help, open a related example with a complete solution and apply the same method to the original problem. • Instant Feedback Check your answer and review the reasoning behind the solution. • Built-In Drawing Pad on iPad Write calculations and sketch diagrams directly on the screen while solving problems. • Offline Practice Downloaded practice content works without an internet connection. An internet connection is required for purchases and restoring access. TRY BEFORE UNLOCKING Try the first question in every exercise. A one-time in-app purchase unlocks questions 2–10 across all exercises. PixelMath uses independently created practice questions designed around the skills assessed in the Digital SAT® Math section. It does not reproduce official exam questions. SAT® is a trademark registered by the College Board, which is not affiliated with and does not endorse this app.