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

This online calculator computes the standard score of a raw score from the given mean of the population and the standard deviation of the population.

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

This online calculator calculates z score from p value

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

The calculator to perform t-Test for the Significance of the Difference between the Means of Two Independent Samples

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).

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

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

Visualize the Correlation in Time Series Data with Our Lagged Scatterplot Calculator

This online calculator computes autocorrelation function for given time series and plots correlogram

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

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

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

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.

This online calculator calculates measure known as fitness score, of how given text is similar to a typical English text. It uses logarithms of probabilities 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.

This online calculator computes covariance between two discrete random variables. It also shows the expected value (mean) of each random variable. You can find the formula used for the calculation of covariance below the calculator.

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

This online calculator calculates seasonal indices based on quarterly data using the method of simple averages