Statistics
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About this app
Statistics is a complete introductory statistics course for your phone. Every topic is explained in plain language, with clear typeset formulas, original drawings, worked examples with every step shown, and practice questions with answers.
What's inside
• Data and sampling: populations and samples, parameters and statistics, types of data, simple random, stratified, cluster and systematic sampling, bias, and experiments versus observational studies
• Graphs of data: frequency tables, bar and pie charts, histograms, frequency polygons, stem-and-leaf and dot plots, cumulative frequency and ogives, and the shape of a distribution
• Centre and spread: mean, median and mode, quartiles and IQR, box plots and outliers, variance and standard deviation (population and sample), z-scores, percentiles, the empirical rule and Chebyshev's theorem
• Probability: sample spaces, addition and complement rules, Venn diagrams, two-way tables, conditional probability, independence, Bayes' theorem with tree diagrams, permutations and combinations
• Discrete distributions: random variables, expected value and variance, binomial, Poisson and geometric distributions
• Continuous distributions: density curves, uniform and exponential distributions, the normal distribution, the standard normal table and the normal approximation to the binomial
• Sampling distributions: standard error, the central limit theorem and the distribution of a sample proportion
• Confidence intervals: intervals for a mean (z and t), the t distribution, intervals for a proportion and choosing a sample size
• Hypothesis testing: null and alternative hypotheses, p-values, Type I and Type II errors, power, one-sample z and t tests, tests for a proportion, two-sample t-test, comparing two proportions and the paired t-test
• Chi-square tests and ANOVA: goodness of fit, test of independence and one-way ANOVA
• Correlation and regression: scatterplots, the correlation coefficient, the least-squares line, residuals and r²
• Formulas and tables: a formula sheet and tables of the standard normal, t and chi-square distributions
Who it is for
High-school and college students taking an introductory statistics course, and anyone who wants to understand the statistics in reports, studies and news.
Features
• 55 lessons in 12 sections
• Drawings throughout: histograms, box plots, ogives, normal curves with shaded areas, tree and Venn diagrams, sampling distributions, confidence intervals and scatterplots with regression lines
• Worked examples with full steps, all checked by computation
• Tap-to-reveal practice questions on every topic
• Statistical tables computed to full accuracy
• Explains what calculators and statistical software compute, so you can choose the right method and read the output
• Search across all pages
• Works offline, with no account needed
• Dark mode
• Available in 8 languages: English, Español, Português, Français, Deutsch, العربية, हिन्दी and Bahasa Indonesia
This app is an independent study aid. It is not affiliated with or endorsed by any exam board, textbook publisher or university.
What's inside
• Data and sampling: populations and samples, parameters and statistics, types of data, simple random, stratified, cluster and systematic sampling, bias, and experiments versus observational studies
• Graphs of data: frequency tables, bar and pie charts, histograms, frequency polygons, stem-and-leaf and dot plots, cumulative frequency and ogives, and the shape of a distribution
• Centre and spread: mean, median and mode, quartiles and IQR, box plots and outliers, variance and standard deviation (population and sample), z-scores, percentiles, the empirical rule and Chebyshev's theorem
• Probability: sample spaces, addition and complement rules, Venn diagrams, two-way tables, conditional probability, independence, Bayes' theorem with tree diagrams, permutations and combinations
• Discrete distributions: random variables, expected value and variance, binomial, Poisson and geometric distributions
• Continuous distributions: density curves, uniform and exponential distributions, the normal distribution, the standard normal table and the normal approximation to the binomial
• Sampling distributions: standard error, the central limit theorem and the distribution of a sample proportion
• Confidence intervals: intervals for a mean (z and t), the t distribution, intervals for a proportion and choosing a sample size
• Hypothesis testing: null and alternative hypotheses, p-values, Type I and Type II errors, power, one-sample z and t tests, tests for a proportion, two-sample t-test, comparing two proportions and the paired t-test
• Chi-square tests and ANOVA: goodness of fit, test of independence and one-way ANOVA
• Correlation and regression: scatterplots, the correlation coefficient, the least-squares line, residuals and r²
• Formulas and tables: a formula sheet and tables of the standard normal, t and chi-square distributions
Who it is for
High-school and college students taking an introductory statistics course, and anyone who wants to understand the statistics in reports, studies and news.
Features
• 55 lessons in 12 sections
• Drawings throughout: histograms, box plots, ogives, normal curves with shaded areas, tree and Venn diagrams, sampling distributions, confidence intervals and scatterplots with regression lines
• Worked examples with full steps, all checked by computation
• Tap-to-reveal practice questions on every topic
• Statistical tables computed to full accuracy
• Explains what calculators and statistical software compute, so you can choose the right method and read the output
• Search across all pages
• Works offline, with no account needed
• Dark mode
• Available in 8 languages: English, Español, Português, Français, Deutsch, العربية, हिन्दी and Bahasa Indonesia
This app is an independent study aid. It is not affiliated with or endorsed by any exam board, textbook publisher or university.
Statistics course: data, probability, distributions, tests and regression.
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Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
- This app may share these data types with third partiesLocation, App activity and 2 others
- No data collectedLearn more about how developers declare collection
- Data is encrypted in transit
- Data can’t be deleted
What’s new
Completely rewritten: a complete introductory statistics course in 55 lessons — data and sampling, graphs, centre and spread, probability, distributions, sampling distributions, confidence intervals, hypothesis tests, chi-square, ANOVA and regression — with drawings, worked examples, practice questions and z, t and chi-square tables. Now in 8 languages: English, Spanish, Portuguese, French, German, Arabic, Hindi and Indonesian.
