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Graphical tests for multivariate normality

You are often required to verify that multivariate data follow a multivariate normal distribution. Recall that univariate normality of each individual variable does not imply multivariate normality overall. We will use functions to check multivariate normality of all variables instead of univariate normality of single variables.

This exercise is part of the course

Multivariate Probability Distributions in R

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Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

# Test sample normality 
qqnorm(___)
qqline(___)
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