Checking the constant variance condition

In addition to checking the normality of distributions of vocabulary scores across levels of social class, we need to check that the variances from each are roughly constant.

Deze oefening maakt deel uit van de cursus

Inference for Numerical Data in R

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Oefeninstructies

Group by social class.
Summarize to calculate the standard deviations of vocabulary scores, storing in a column named std_dev_wordsum.
Verify the constant variance condition.

Praktische interactieve oefening

Probeer deze oefening eens door deze voorbeeldcode in te vullen.

gss %>%
  # Group by class
  ___ %>%
  # Calculate the std dev of wordsum as std_dev_wordsum
  ____

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