Statistics Calculators

Statistics calculators for homework, reports and quick checks. The standard deviation calculator finds the mean, variance and standard deviation of a list of numbers, treating it as a sample or a whole population, with every step shown. The random number generator picks one or many whole numbers in any range, with or without repeats, using your browser's cryptographic randomness so each number is equally likely. Both explain the formula behind the result, so you know which answer your teacher or report expects.