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.
Cet exercice fait partie du cours
Inference for Numerical Data in R
Instructions
- 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.
Exercice interactif pratique
Essayez cet exercice en complétant cet exemple de code.
gss %>%
# Group by class
___ %>%
# Calculate the std dev of wordsum as std_dev_wordsum
____