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Histogram group number Sturges formula and other methods of determining the number of groups in histogram generation |

Binomial distribution, probability density function, cumulative distribution function, mean and variance This calculator calculates probability density function, cumulative distribution function, mean and variance of a binomial distribution for given n and p |

Pearson correlation coefficient The Pearson correlation coefficient calculator is a tool that allows users to input sets of paired random variables and calculate the correlation between them. |

Histogram Builder The Histogram Builder calculator allows users to input a set of numbers and generate a histogram, either by using the Sturgess, Scott or Freedman-Diaconis formula, or manually setting the number of groups. |

The Symbol Frequency Table Calculator The Symbol Frequency Table Calculator is a tool that takes in a text message and produces a table of the frequencies of each symbol (i.e., character) that appears in the message. The calculator can be customized to ignore spaces and/or case, allowing for a more accurate analysis of the message's symbol frequencies. |

Wordpress plugin With Planetcalc plugin for Wordpress you can easily insert any planetcalc calculator in your wordpress-based site or blog pages. |

Normal distribution Plots the CDF and PDF graphs for normal distribution with given mean and variance. |

Student t-distribution Calculates cumulative distribution function value and probability density function value for Student t-distribution. Quantile calculator evaluates Student quantiles for given probability and specified number of degrees of freedom. |

Probability of given number success events in several Bernoulli trials Gives the probability of k success outcomes in n Bernoulli trials with given success event probability. |

Bernoulli trials table This online calculator calculates probability of k success outcomes in n Bernoulli trials with given success event probability for each k from zero to n. |

Tips and tricks #8: How to reuse existing calculator This article describes process of reusing another calculator's logic (algorithm) in your calculator. |

Log-normal distribution It calculates the probability density function (PDF) and cumulative distribution function (CDF) of long-normal distribution by a given mean and variance. |

Bayes’ theorem This online calculator calculates posterior probabilities according to Bayes’ theorem. |