Shapiro-Wilk Test
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Use: The Shapiro-Wilk test is a statistical test used to assess whether a given sample of data follows a normal distribution. It is particularly effective for relatively small sample sizes.
Example: Checking if the scores of a standardized test in a population follow a normal distribution.
Steps:
Select a column with continuous data.
Perform the Shapiro-Wilk test to check for normality.
Evaluate the test statistic and associated p-value.
A low p-value (<0.05) indicates deviation from normality.
Normality assumption is violated if the p-value is less than the chosen significance level.
