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• Centered Moving Average

  This online calculator calculates centered moving average, which is used instead of moving average then number of periods is even

• Count to Probability

  This online calculator takes a list of events along with number of times the particular event occured and calculates the probability (and log probability) of each event by dividing event count to the total number of events.

• Covariance Calculator

  This online calculator computes covariance between two discrete random variables

• Cuba World Development Indicators 2016 - in memory of Fidel Castro

  This calculator provides access to 752 world development indicators for Cuba imported from World Bank data at 2016. In memory of Fidel Castro.

• Estimated Mean of a Population

  This online calculator allows you to estimate mean of a population using given sample

• Events timeline

  This online calculator analyzes and summarizes sequence of events on a timeline. It calculates days passed between events, as well as statistical data, e.g. a mean time between events, a variance and a deviation

• Geometric Distribution. Probability density function, cumulative distribution function, mean and variance

  This calculator calculates geometric distribution pdf, cdf, mean and variance for given parameters

• Hypergeometric Distribution. Probability density function, cumulative distribution function, mean and variance

  This calculator calculates hypergeometric distribution pdf, cdf, mean and variance for given parameters

• Lagged scatterplot

  This online calculator builds scatterplot of the time series against itself offset in time

• Mann-Whitney Test

  This online calculator performs the Mann–Whitney U test (also called the Mann–Whitney–Wilcoxon (MWW), Wilcoxon rank-sum test, or Wilcoxon–Mann–Whitney test).

• Negative Binomial Distribution. Probability density function, cumulative distribution function, mean and variance

  This calculator calculates negative binomial distribution pdf, cdf, mean and variance for given parameters

• P-value

  This online calculator calculates p-value for one sided and two sided tests given the z-score

• Paired Sample t-Test

  This online calculator performs t-Test for the Significance of the Difference between the Means of Two Correlated Samples

• Poisson Distribution. Probability density function, cumulative distribution function, mean and variance

  This calculator calculates poisson distribution pdf, cdf, mean and variance for given parameters

• Probability Urn simulator

  This calculator simulates urn or box with colored balls often used for probability problems and can calculate probabilities of different events.

• Text fitness

  This online calculator computes text "fitness". That is, how similar the given text to other texts written in English language.

• Text fitness (version 2)

  This online calculator calculates measure known as fitness score, of how given text is similar to a typical English text. It uses frequencies of unigrams, bigrams and trigrams to calculate fitness score. The reference frequencies are calculated from Leipzig Corpora Collection and can be downloaded from http://practicalcryptography.com/cryptanalysis/text-characterisation/quadgrams/. The less value you get, the better.

• Text fitness (version 3)

  This online calculator calculates measure known as fitness score, of how given text is similar to a typical English text. It uses logarithms of probabilites with normalization to calculate fitness score. The reference frequencies are calculated from Leipzig Corpora Collection and can be downloaded from http://practicalcryptography.com/cryptanalysis/text-characterisation/quadgrams/. The less value you get, the better.

• Time Series Decomposition

  This online calculator decomposes time series by extracting seasonality and trend from data

• Tips and tricks #8: How to reuse existing calculator

  This article describes process of reusing another calculator's logic (algorithm) in your calculator.