The maximum sample size is 5000

tails: for Shapiro-Wilk Test you can use only right tail

Target: Check if the normal distribution model fits the observations

The tool combine the following methods: Formal normality test: **Shapiro-Wilk test** results, this is one of the most powerfull normality tests. Graphical methods: **QQ-Plot chart** and **Histogram**

H_{0}: Normal Distribution | |

H_{1}: Other Distribution |

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When entering data, press Enter after each value or copy data from Excel, Google sheets or any tool that separate data with **Tab**. When copy the data, choose **one block** includes the header (or only data), and paste below.

hover for excel example

n: | sample size | |

x: | sample average | |

median: | sample median | |

S: | sample standard deviation | |

SS: | Sum of Squares | |

b: | b statistic | |

skewness: | ||

Excess kurtosis: | ||

p-value: | the probability the data was sampled from a normal distribution | |

Outliers | observation point that is distant from other observations |

validation message