KNIME Statistic Nodes (Labs) version 3.6.0.v201805031008 by KNIME AG, Zurich, Switzerland
The Shapiro-Wilk Normality Test checks whether a sample comes from a normally distributed population. It is applicable for 3 to 5000 data points. The node outputs two values: the test statistic W and the corresponding p-value. To accept or reject the null hypothesis, one can either compare W to a predefined threshold Wcritical or use a threshold for the p-value. Since the test is biased by sample size, the test may be statistically significant from a normal distribution in any large samples. Thus a Q–Q plot is required for verification in addition to the test. More information about this test can be found on Wikipedia.
To use this node in KNIME, install KNIME Statistic Nodes (Labs) from the following update site: