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How do people value white chocolate?

With effects coding, we can find the parameter for the left-out level as the negative sum of the parameters for the other levels of the factor. Let's compute the value of White chocolate using this rule. choc_m7 is still loaded.

This exercise is part of the course

Choice Modeling for Marketing in R

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Exercise instructions

  • The coefficients for the levels of Type are in positions 5 to 8. Select these coefficients and print them to confirm.
  • Compute the negative sum of those coefficients. This is the coefficient for the left-out White type.

Hands-on interactive exercise

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

# print the coefficients 


# compute the negative sum of those coefficients
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