Art of Stat vs PixelMath

News: The Regression app is now part of the all new "Art of Stat" app, which contains the Regression and seven other modules. Please consider getting the Art of Stat app for the latest updates and features from the App Store. Simply search for "Art of Stat" on the App Store. This app will continue to work, but future development is concentrated on the new Art of Stat app. Original Description: The Art of Stat: Regression app creates scatterplots, fits linear, logistic, Poisson or exponential regression models, and displays inference for model parameters (standard errors, confidence intervals, P-values). The app now also fits multiple linear and logistic regression models and allows including categorical predictors and two-way interactions! The app computes and displays confidence intervals for the mean response and prediction intervals for a future response. The fitted model and the intervals are visualized on the scatterplot, and you can obtain and plot raw and standardized residuals. You can color points on the scatterplot according to a third quantitative or categorical variable to reveal additional patterns. For data entry, you can enter your own data via the new Data Editor app, import a CSV file, or choose from several pre-loaded example datasets. Features: - Scatterplot Matrix to study pairwise relationships - Display the fitted regression equation on the scatterplot, even when including (and additional) categorical predictor - Table with all regression coefficients and their inferences (P-values, confidence intervals) - Summary statistics such has R^2, R^2-adjusted and maximized Log-Likelihood - Fitted values and (standardized) residuals (which you can download) - Predictions for your own values of the explanatory variables - Residual plot to check assumptions and for outliers

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.