The maximum sample size is 5000
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: | ||
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 |