Shapiro-Wilk Test

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.

Column Requirement: Continuous data.

Steps:

1. Select a column with continuous data.

2. Perform the Shapiro-Wilk test to check for normality.

3. Evaluate the test statistic and associated p-value.

4. A low p-value (<0.05) indicates deviation from normality.

5. Normality assumption is violated if the p-value is less than the chosen significance level.