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Name
Urn probability simulator
This calculator simulates the urn (or box with colored balls) often used for probability problems, and can calculate probabilities of different events.
Z-score / Standard score
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.
P-value
This online calculator calculates p-value for one sided and two sided tests given the z-score
Z-score from P-value
This online calculator calculates z score from p value
Estimated Mean of a Population
This online calculator allows you to estimate mean of a population using given sample
Two sample t-Test
The calculator to perform t-Test for the Significance of the Difference between the Means of Two Independent Samples
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).
Paired Sample t-Test
This online calculator performs t-Test for the Significance of the Difference between the Means of Two Correlated Samples
Centered Moving Average
This online calculator calculates centered moving average, which is used instead of moving average then number of periods is even
Lagged scatterplot
This online calculator builds scatterplot of the time series against itself offset in time
Time Series Autocorrelation function (ACF)
This online calculator computes autocorrelation function for given time series and plots correlogram
Time Series Decomposition
This online calculator decomposes time series by extracting seasonality and trend from data
Text fitness
This online calculator computes text "fitness". That is, how similar the given text to other texts written in English language.
Number to Probability
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.
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 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.
Covariance calculator
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.
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
Seasonal Indices for Quarterly Data
This online calculator calculates seasonal indices based on quarterly data using the method of simple averages
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