Building Atoms and Isotopes vs Statistics

With the Building Atoms, Ions, and Isotopes app, explore the composition of the elements. Build atoms, ions, and isotopes by selecting appropriate numbers of protons, neutrons, and electrons. For reference, this app also includes atomic theory information and a periodic table that is interactive in the iPad version.

StatRise helps students learn statistics and probability without ads, accounts, or internet-dependent tools. Use it as a statistics calculator, study guide, AP Statistics review app, intro stats companion, or quick homework helper when you need to understand the work behind the answer. LEARN STATISTICS STEP BY STEP Work through 54 lessons across 6 core modules: - Descriptive statistics and data visualization - Probability rules, conditional probability, and Bayes theorem - Normal, binomial, and Poisson distributions - Sampling distributions and the Central Limit Theorem - Confidence intervals and hypothesis testing - Regression, correlation, residuals, and R-squared Each lesson is built for students who want clear definitions, formulas, examples, and practical intuition. CALCULATE WITH WORKED SOLUTIONS StatRise includes 39 statistics and probability calculators, including: - Mean, median, mode, range, variance, standard deviation, quartiles, IQR, skewness, and kurtosis - Probability, complements, unions, intersections, conditional probability, and Bayes theorem - Permutations, combinations, and factorials - Normal, binomial, and Poisson distribution tools - Z-tests, t-tests, paired t-tests, chi-square tests, and ANOVA - Confidence intervals for means and proportions - Linear regression, correlation, R-squared, residuals, and scatter plots Free users can use the included free calculators. StatRise Pro unlocks the full calculator library and step-by-step worked solutions. PRACTICE FOR MASTERY Build confidence with 600+ practice questions and detailed explanations. - Today's 5 gives you a focused daily review set - Mixed practice lets you choose what to study - Timed exam mode helps with test pacing - Mistake review keeps track of missed questions - Spaced revision brings weak topics back at the right time Progress is stored locally on your device so you can track accuracy, streaks, weekly goals, and topic mastery without creating an account. SEE PROBABILITY AND STATS VISUALLY Interactive simulations make abstract ideas easier to understand: - Coin and dice simulator - Distribution explorer - Sampling distribution and CLT visualizer - Confidence interval coverage simulator - Regression lab - Type I and Type II error visualizer OFFLINE-FIRST AND PRIVATE Core lessons, calculators, practice, and simulations run on-device. StatRise has no ads, no login system, no tracking, and no custom backend. Purchases and restore require an App Store connection. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/