WEB SPSS Shapiro-Wilk Test Quick Tutorial with Example
About the Shapiro-Wilk Test
The Shapiro-Wilk test is a hypothesis test that is applied to a sample with a null hypothesis that the sample has been generated from a normal distribution.
Null hypothesis and significance
The null-hypothesis of this test is that the population is normally distributed. Thus, if the p-value is less than the chosen alpha level, then the null hypothesis can be rejected.
Example
I ran the Shapiro-Wilk test using R Shapirotest(precisionH4UH4U) and I got the following result: W = 0.9502, p-value = 0.6921.
The above table presents the results from two well-known tests of normality, namely the Kolmogorov-Smirnov Test and the Shapiro-Wilk Test.
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