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Maths, statistics and computing tools

Maths, statistics, data and computer science. 2 free tools, with no sign-up. Nothing you enter leaves your device.

Statistics 1

Sample size and power calculatorHow many subjects, samples or survey responses do you need? Sample size for comparing two means, paired data, two proportions, or a survey's margin of error, with power curves. Matches R and G*Power. #32

Data science and machine learning 1

CSV profiler and SQL playgroundOpen CSV, TSV or Excel files and get a profile of every column: type, missing values, distinct values, range and most common values. Then query them with SQL (SQLite), join files, and download the result. Nothing is uploaded. #38